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LG UK6300
TV REVIEW

Usage Ratings - Version 1.3
7.1
Mixed Usage
Value for price beaten by
: LG UM7300
5.9
Movies
7.7
TV Shows
7.4
Sports
7.9
Video Games
5.6
HDR Movies
7.3
HDR Gaming
8.0
PC Monitor
This tv was replaced by the LG UM7300

Type : LED
Sub-Type
:
IPS
Resolution : "4k"

The LG UK6300 is a decent RGBW IPS TV with wide viewing angles, so it remains accurate when viewed at an angle. It also has low input lag so feels responsive. Unfortunately, when viewed in a dark room, blacks appear gray due to the low native contrast ratio, but when viewed in a bright room, this isn't noticeable. The out of the ordinary "RGBW" pixel structure also can cause smaller details and straight lines to lose sharpness, especially when used as a PC monitor.

Pros
  • Feels responsive with low input lag
  • Short blur trail
Cons
  • Blacks appear gray in a dark room
  • Less accurate RGBW pixel structure

Test Results
Design 6.5
Picture Quality 6.8
Motion 6.9
Inputs 9.5
Sound Quality 6.1
Smart Features 7.8
Update 3/4/2019: The VESA mount was incorrectly listed as 400x400. It is actually 200x200.
Update 2/28/2019: Converted to Test Bench 1.3. Learn more about our versioned test bench system here.

Check Price

6.5

Design

Curved : No

The design of the 2018 UK6300 LED TV is very basic. It is a very functional design with no serious deficiencies, but it won't be the center of attention in a room. Some of the rear-facing inputs may be difficult to access when wall mounted, and if a component connection is required it is impossible to mount the TV flush to the wall. There is no cable management.

Stand

The stand is almost the full width of the TV and is identical to the UJ6300 from last year. It is made of plastic and supports the TV well.

Footprint of the 55" TV stand: 33.3" x 8.6"

Back
Wall Mount : VESA 200x200

The back of the TV is very basic. There is no cable management. It is nearly identical to the UJ6300 from last year. Some of the inputs face out the back of the TV, which may be difficult to access if wall mounted.

Update 03/04/2019: The VESA mount was incorrectly listed as 400x400, it is actually 200x200 on the 43" model.

Borders
Borders : 0.75" (1.9 cm)

The borders of the TV are thicker than on high-end models.

Thickness
Max Thickness : 3.19" (8.1 cm)

The TV is quite thick and will stick out from the wall if mounted.

Temperature
Maximum Temperature
:
93 °F (34 °C)
Average Temperature
:
88 °F (31 °C)

The TV is fairly cool. There are a few warm spots along the back but they are barely warm to the touch.

6.0 Build Quality

Decent build quality on the LG UK6300. Nothing stands out as exceptionally good, but there is nothing worrisome either.

6.8

Picture Quality

The 2018 LG UK6300 LED TV has decent picture quality. It has a limited native contrast ratio and poor black screen uniformity, so true dark room viewing is not the greatest. It has great reflection handling, but the limited brightness means it can't effectively overcome glare in a very bright room. It has decent gray uniformity and a wide viewing angle, great for sports lovers who like to have friends over for the big game. Out of the box color accuracy isn't great, and the most accurate picture mode Expert (Dark Room) is also the dimmest. The less accurate RGBW pixel structure causes some artifacts, this is especially noticeable when used as a PC monitor.

6.1 Contrast
Native Contrast
:
1096 : 1
Contrast with local dimming
:
N/A

Mediocre native contrast ratio. Blacks are not truly black, and dark room viewing is less than ideal, especially taking into account the black uniformity results.

The contrast ratio is slightly worse than last year's UJ6300.

Note: The 50" model available in some areas has a VA panel, which we expect to have a higher native contrast ratio.

0 Local Dimming
Local Dimming
:
No
Backlight
:
Direct

The UK6300 does not have a local dimming feature. This video is provided for reference only.

5.9 SDR Peak Brightness
SDR Real Scene Peak Brightness
:
191 cd/m²
SDR Peak 2% Window
:
187 cd/m²
SDR Peak 10% Window
:
198 cd/m²
SDR Peak 25% Window
:
198 cd/m²
SDR Peak 50% Window
:
198 cd/m²
SDR Peak 100% Window
:
198 cd/m²
SDR Sustained 2% Window
:
186 cd/m²
SDR Sustained 10% Window
:
197 cd/m²
SDR Sustained 25% Window
:
198 cd/m²
SDR Sustained 50% Window
:
197 cd/m²
SDR Sustained 100% Window
:
197 cd/m²
SDR ABL
:
0.001

Mediocre peak real scene with the more accurate Expert (Dark Room) picture mode. There is almost no variation depending on content.

For a brighter room, the Standard picture mode with our recommended settings and a W30 color temperature is better, peak brightness is 286 cd/m². In Vivid mode with the default settings, the UK6300 is much brighter at 364 cd/m², although a lot of color accuracy is lost in that mode.

It is a bit brighter than the UJ6300, especially when the other picture modes are used.

6.0 HDR Peak Brightness
HDR Real Scene Peak Brightness
:
296 cd/m²
HDR Peak 2% Window
:
223 cd/m²
HDR Peak 10% Window
:
315 cd/m²
HDR Peak 25% Window
:
313 cd/m²
HDR Peak 50% Window
:
312 cd/m²
HDR Peak 100% Window
:
311 cd/m²
HDR Sustained 2% Window
:
222 cd/m²
HDR Sustained 10% Window
:
312 cd/m²
HDR Sustained 25% Window
:
311 cd/m²
HDR Sustained 50% Window
:
310 cd/m²
HDR Sustained 100% Window
:
308 cd/m²
HDR ABL
:
0.023

Mediocre HDR peak brightness. The LG UK6300 is not bright enough to overcome glare in a bright room, but due to the poor black uniformity, it is not well suited to a very dark room. Like with SDR content, small highlights in some scenes do not really pop, brightness is very similar regardless of content.

7.1 Gray Uniformity
50% Std. Dev.
:
4.761 %
50% DSE
:
0.201 %
5% Std. Dev.
:
0.597 %
5% DSE
:
0.081 %

Decent gray uniformity. There is some dirty screen effect near the center, but it is not too noticeable when watching sports. The edges of the LG are noticeably dimmer than the rest of the TV and there are some dark vertical bands.

7.4 Viewing Angle
Color Washout
:
24 °
Color Shift
:
70 °
Brightness Loss
:
29 °
Black Level Raise
:
70 °
Gamma Shift
:
40 °

Mediocre viewing angle but better than almost all VA TVs. Black levels stay accurate regardless of angle, but colors shift noticeable at moderate angles.

Note: The 50" model has a VA panel, which we expect to have a worse viewing angle.

4.0 Black Uniformity
Native Std. Dev.
:
3.324 %
Std. Dev. w/ L.D.
:
N/A

Poor black uniformity on the UK6300. There is no local dimming feature, and there is clouding across the entire screen when displaying the test cross. The edges of the screen are darker than the rest of the TV and there are vertical bands visible throughout.

8.5 Reflections
Screen Finish
:
Semi-gloss
Total Reflections
:
3.2 %
Indirect Reflections
:
0.8 %

The UK6300 has good reflection handling. The semi-gloss screen diffuses direct reflections across the screen. The screen is not very effective at overcoming glare.

6.4 Pre Calibration
White Balance dE
:
5.16
Color dE
:
3.09
Gamma
:
2.16
Color Temperature
:
6444 K
Picture Mode
:
Expert (Dark Room)
Color Temp Setting
:
Warm 2
Gamma Setting
:
2.2

Mediocre color accuracy out of the box. The Expert (Dark Room) picture mode has the most accurate colors. The white balance and color balance dE are high enough that most people would notice it. The gamma curve is mostly flat, and not too far off from our 2.2 target.

9.5 Post Calibration
White Balance dE
:
0.17
Color dE
:
1.27
Gamma
:
2.19
Color Temperature
:
6502 K
White Balance Calibration
:
20 point
Color Calibration
:
Yes
Auto-Calibration Function
:
No

Calibration was long, but very effective. White balance is almost perfect, and color dE is low enough that most people won't be able to see any inaccuracies. Gamma follows the target curve almost perfectly, and color temperature is almost perfect.

You can see our recommended settings here.

8.0 480p Input

Upscaling of low resolution content such as DVDs is good.

8.0 720p Input

720p content including cable TV looks good. There are no obvious artifacts or softening of the image.

9.0 1080p Input

1080p content like from a Blu-ray or non-4k games looks good.

8.0 4k Input

The less accurate RGBW pixel structure results in some artifacts, producing results similar to the UH6500 as can be seen here. This is especially noticeable when using the UK6300 as a PC Monitor.

7.0 Color Gamut
Wide Color Gamut
:
No
DCI P3 xy
:
77.44 %
DCI P3 uv
:
83.64 %
Rec 2020 xy
:
55.65 %
Rec 2020 uv
:
61.28 %

Standard color gamut, only good enough for SDR. See our recommended settings for the most accurate colors here.

The Expert (Dark Room) EOTF follows our curve perfectly, and the brightness rolls off gently as the TV approaches its peak brightness.

The PC and Game EOTF curves follow the input closely but are under the curve a bit. In these modes, the brightness rolls off gently at the peak brightness of the TV, so there is less clipping.

Update 06/29/2018: The DCI P3 xy and DCI P3 uv results were swapped when entering the data. This has now been fixed, and the score and performance are unchanged.

4.8 Color Volume
Normalized DCI P3 Coverage ITP
:
56.1 %
10,000 cd/m² DCI P3 Coverage ITP
:
20.2 %
Normalized Rec 2020 Coverage ITP
:
40.1 %
10,000 cd/m² Rec 2020 Coverage ITP
:
14.2 %

Poor color volume on the UK6300, similar to the UJ6300. The TV's RGBW structure cannot produce colors as bright as pure white. It also cannot produce very good dark colors.

8.4 Gradient
Color Depth
:
10 Bit
Red (Std. Dev.)
:
0.090 dE
Green (Std. Dev.)
:
0.116 dE
Blue (Std. Dev.)
:
0.081 dE
Gray (Std. Dev.)
:
0.105 dE

There is small banding throughout our gradient test, especially in grayscale and the darker greens. Real-world tests show some banding in movies with large areas of similar colors, like the outside shots in The Martian.

5.1 Temporary Image Retention
IR after 0 min recovery
:
2.88 %
IR after 2 min recovery
:
0.42 %
IR after 4 min recovery
:
0.17 %
IR after 6 min recovery
:
0.00 %
IR after 8 min recovery
:
0.00 %
IR after 10 min recovery
:
0.00 %

The LG UK6300 suffers from image retention, and it is quite noticeable with our test image. These results are disappointing, almost as bad as last year's UJ6300. These results are among the worst image retention of any TV we have tested.

10 Permanent Burn-In Risk
Permanent Burn-In Risk
:
No

Although some IPS panels can suffer from temporary image retention, this doesn't appear to be permanent as the IPS panel in our long-term test appear immune.

Pixels
6.9

Motion

The LG UK6300 has decent motion handling. It has a good pixel response time, which helps reduce motion trail. The 120 Hz backlight uses PWM to adjust the intensity, which causes flicker, and there is no option to reduce the flicker frequency. It can interpolate low frame rate content, but since it is only a 60 Hz panel it can't interpolate frames that are already 60 Hz. It is judder-free when playing native 24p content, but when playing 24 fps content through a cable box at 60p or 60i, there is judder.

7.9 Response Time
80% Response Time
:
7.9 ms
100% Response Time
:
15.0 ms

The response time is good. There is some overshoot with the 0-20% slide which causes a much higher response time on dim scenes. There is very little motion trail.

4.0 Flicker-Free
Flicker-Free
:
No
PWM Dimming Frequency
:
120 Hz

The TV uses PWM to dim the backlight, and there is flicker at all backlight levels. This flicker helps to clear up motion a little, but results in duplications in fast moving objects.

The 'Standard' picture mode is brighter. In this mode the backlight stays on longer, as shown in this plot.

5.4 Black Frame Insertion (BFI)
Optional BFI
:
No
Min Flicker for 60 fps
:
120 Hz
60 Hz for 60 fps
:
No
120 Hz for 120 fps
:
N/A
Min Flicker for 60 fps in Game Mode
:
120 Hz

Same as the UJ6300, there is no option to reduce the flicker frequency to 60Hz.

7.0 Motion Interpolation
Motion Interpolation (30 fps)
:
Yes
Motion Interpolation (60 fps)
:
No

The LG UK6300 can interpolate lower frame rate content up to 60fps. As this is a 60Hz panel, it can't interpolate 60fps content. When motion interpolation is enabled there are visible artifacts.

7.7 Stutter
Frame Hold Time @ 24 fps
:
26.7 ms
Frame Hold Time @ 60 fps
:
1.7 ms

The LG UK6300 is good at displaying content without stutter. 24p movies have less visible stutter, especially with wide-panning shots.

7.8 24p Judder
Judder-Free 24p
:
Yes
Judder-Free 24p via 60p
:
No
Judder-Free 24p via 60i
:
No
Judder-Free 24p via Native Apps
:
Yes

Only 24p content played from a true 24p source like a Blu-ray player are judder free. The UK6300 can't remove judder from 24p sources played from a 60p/60i source like a cable box.

To play 24p movies without judder when playing from a Blu-ray player, the 'Real Cinema' setting must be enabled.

0 Variable Refresh Rate
Native Refresh Rate
:
60 Hz
Variable Refresh Rate
:
No
4k VRR Maximum
:
N/A
4k VRR Minimum
:
N/A
1080p VRR Maximum
:
N/A
1080p VRR Minimum
:
N/A
1440p VRR Maximum
:
N/A
1440p VRR Minimum
:
N/A
VRR Supported Connectors
:
N/A

The LG 43UK6300 does not support any of the variable refresh rate technologies like Freesync.

9.5

Inputs

The LG UK6300 supports most common input resolutions without issue. Game mode is able to effectively bypass almost all processing by the TV, and it has exceptionally low input lag across all resolutions as long as game mode is used. With interpolation enabled or outside of game mode the input lag is very high.

9.9 Input Lag
1080p @ 60 Hz
:
11.5 ms
1080p @ 60 Hz Outside Game Mode
:
134.5 ms
1440p @ 60 Hz
:
N/A
4k @ 60 Hz
:
11.8 ms
4k @ 60 Hz + 10 bit HDR
:
11.3 ms
4k @ 60 Hz @ 4:4:4
:
12.8 ms
4k @ 60 Hz Outside Game Mode
:
134.2 ms
4k @ 60 Hz With Interpolation
:
134.0 ms
8k @ 60 Hz
:
N/A
1080p @ 120 Hz
:
N/A
1440p @ 120 Hz
:
N/A
4k @ 120 Hz
:
N/A
1080p with Variable Refresh Rate
:
N/A
1440p with VRR
:
N/A
4k with VRR
:
N/A
8k with VRR
:
N/A
Auto Low Latency Mode (ALLM)
:
No

Extraordinary low input lag, as long as the 'Game' Picture Mode is selected. For use as a PC Monitor, it is recommended to set the input label to 'PC', and use the'Game' Picture Mode for the lowest input lag possible.

Chroma 4:4:4 only works properly when the input label is set to 'PC' with RGB color; it doesn't display correctly with YCbCr.

7.5 Supported Resolutions
1080p @ 60 Hz @ 4:4:4
:
Yes
1080p @ 120 Hz
:
No
1440p @ 60 Hz
:
No
1440p @ 120 Hz
:
No
4k @ 60 Hz
:
Yes
4k @ 60 Hz @ 4:4:4
:
Yes
4k @ 120 Hz
:
No
8k @ 30 Hz or 24 Hz
:
No
8k @ 60 Hz
:
No

Most of the common input resolutions are supported with issue. Like most LG TVs, the input label has to be set to 'PC' for chroma 4:4:4 support. For 4:4:4 to work properly, RGB colors must be used. The less accurate RGBW pixel structure causes artifacts when used as a PC Monitor.

For 4k 60Hz, HDMI Ultra HD Deep Color must be enabled in the Additional Settings menu for the input used.

4k HDR does not work properly when in PC mode, colors appear washed out.

Input Photos
Total Inputs
HDMI : 3
USB : 2
Digital Optical Audio Out : 1
Analog Audio Out 3.5mm : 0
Analog Audio Out RCA : 0
Component In : 1 (shared)
Composite In : 1 (shared)
Tuner (Cable/Ant) : 1
Ethernet : 1
DisplayPort : 0
IR In : 0
SD/SDHC : 0

There is a single shared component/composite input on the back of the TV.

Inputs Specifications
HDR10
:
Yes
HDR10+
:
No
Dolby Vision
:
No
HLG
:
Yes
3D
:
No
HDMI 2.0 Full Bandwidth
:
Yes (HDMI 1,2,3)
HDMI 2.1
:
No
CEC : Yes
HDCP 2.2 : Yes (HDMI 1,2,3)
USB 3.0
:
No
Variable Analog Audio Out : No
Wi-Fi Support : Yes (2.4 GHz, 5 GHz)
Audio Passthrough
ARC
:
Yes (HDMI 2)
eARC support
:
No
Dolby Atmos via TrueHD via eARC
:
No
DTS:X via DTS-HD MA via eARC
:
No
5.1 Dolby Digital via ARC
:
Yes
5.1 DTS via ARC
:
Yes
5.1 Dolby Digital via Optical
:
Yes
5.1 DTS via Optical
:
Yes
6.1

Sound Quality

The LG UK6300 has a mediocre sound. This TV doesn't get very loud and doesn't have a lot of bass either, but it produces clear dialogs and has a decent distortion performance. For a better sound, a dedicated speaker setup or soundbars are recommended.

5.9 Frequency Response
Low-Frequency Extension
:
100.79 Hz
Std. Dev. @ 70
:
3.86 dB
Std. Dev. @ 80
:
4.43 dB
Std. Dev. @ Max
:
5.90 dB
Max
:
83.7 dB SPL
Dynamic Range Compression
:
3.77 dB

The LG UK6300 has a below-average frequency response performance. LFE (low-frequency extension) is at 100Hz, which is sub-par. This means that this TV will have a full and warm sound, but not a lot body or punch, and no thump or rumble to its bass either. The response above the LFE is well-balanced for the most part, which results in clear dialogs but they may lack some airiness. Also, this TV doesn't get very loud and produces considerable pumping and compression artifacts under heavy loads. Additionally, since this TV doesn't have a room correction system, it wasn't able to remove the mode of our test room which occur around 200Hz.

7.0 Distortion
Weighted THD @ 80
:
0.298
Weighted THD @ Max
:
0.570
IMD @ 80
:
2.93 %
IMD @ Max
:
5.48 %

The distortion performance of the LG UK6300 is decent. The overall amount of harmonic distortion is within decent limits, and there is not big jump in THD under maximum loudness either, but this TV doesn't get very loud.

7.8

Smart Features

Smart OS : WebOS
Version : 4.0

The UK6300 runs LG's webOS 4.0, which is easy to navigate and has a lot of great features. It has a good selection of built-in apps, and the LG Content Store has a wide selection of additional apps as well as movies and TV shows available for rental or purchase. Unfortunately, the interface has ads as well as suggested content, and there is no option to disable them. The included remote is basic but provides easy access to most of the common features. It is possible to upgrade the remote to the more advanced model like the one included with the UJ7700, in which case the UK6300 would support the more advanced voice controls and ThinQ AI.

8.5 Interface
Ease of Use
:
Easy
Smoothness
:
Average
Time Taken to Select YouTube
:
2 s
Time Taken to Change Backlight
:
12 s
Advanced Options
:
Many

The WebOS interface hasn't changed much since last year. It is functional and easy to navigate, but there are some performance issues with animations.

0 Ad-Free
Ads
:
Yes
Opt-out
:
No
Suggested Content in Home
:
Yes
Opt-out of Suggested Content
:
No

Immediately out of the box there were ads within the LG Content Store. They cannot be removed and there is no option to opt-out. There is also suggested content in the home menu.

8.0 Apps and Features
App Selection
:
Many
App Smoothness
:
Average
Cast Capable
:
Yes
USB Drive Playback
:
Yes
USB Drive HDR Playback
:
Yes
HDR in Netflix
:
Yes
HDR in YouTube
:
Yes

There is a decent selection of built-in apps, and a wide selection is available on the LG Content Store. The built-in media apps work well.

6.5 Remote
Size
:
Medium
Voice Control
:
No
CEC Menu Control
:
Yes
Other Smart Features
:
No

The remote included in the LG 43UK6300 is the basic LG remote. There is no voice control, and it is IR only. There are a few quick access buttons that provide access to the most common functions, including changing inputs, accessing the search function, and opening the settings menu. It does not have the virtual mouse pointer of the more advanced LG TVs, but this can be added by upgrading the remote.

7.0 Remote App
Acts as the Remote
:
Yes
Directly Launches Apps and Inputs
:
Both
Inputs Text in YouTube
:
No
Inputs Text in Netflix
:
No
Streams Device Files
:
Yes
Controls TV Settings
:
No
Voice Control
:
No

LG has the same basic remote app for all of their smart TV lineup. It works as a decent replacement remote, and it can launch apps and change inputs. Like most remote apps, it can't be used to enter text in apps, but it can stream media from your smart device.

TV Controls

Like the UJ6300, there is a single physical button on the UK6300. Pressing the button brings up a menu with quick access to power, input selection, volume and channel control.

In The Box

  • Manual
  • Cable Management Strap
  • Remote
  • Batteries
  • Warranty Information
Not Shown:
  • 60.25" Power Cable

Misc
Power Consumption : 36 W
Power Consumption (Max) : 68 W
Firmware : 03.00.63

Differences between Sizes and Variants

We tested the 43" (43UK6300PUE). For the most part, we expect our review to be valid for the 49" (49UK6300), 55" (55UK6300) and 65" (65UK6300).

The UK6570 has been released in 70", 75" and 86" sizes. We haven't tested them and don't know how they perform or if they are the same panel as the UK6300. The 86" has a 120 Hz native refresh rate.

Size US Canada UK
43" 43UK6300PUE 43UK6300BUB 43UK6300PLB
49" 49UK6300PUE 49UK6300BUB 49UK6300PLB
50" 50UK6300PUE 50UK6300BUB N/A
55" 55UK6300PUE 55UK6300BUB 55UK6300PLB
65" 65UK6300PUE 65UK6300BUB 65UK6300PLB

There is a 50" variant with a VA panel available in some areas. We expect this model to have a much better native contrast and black uniformity, but the viewing angle won't be as good.

If someone comes across a different type of panel or if their LG UK6300 doesn't correspond to our review, let us know and we will update the review.

Update 12/05/2018: LG has recently release the UK6090, which appears to be a minor variant of the UK6300. They appear to perform similarly, but there may be some minor differences we are unaware of.

Compared to other TVs

Top left: TCL P607 (55P607). Bottom left: Samsung MU6300 (UN55MU6300). Middle: LG UK6300 (43UK6300). Top right: Vizio E Series 2017 (E65-E1). Bottom right: TCL S405(43S405).  Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The LG UK6300 is a very basic entry level 4k LED TV, but it doesn't offer great value compared to the competition. There will almost always be something better for a similar price. See our recommendations for the best budget TVs and the best TVs under $500.

Samsung NU7100
40" 43" 50" 55" 58" 65" 75"

If you've got a bright room with wide seating, then the LG UK6300 is a better choice due to the better viewing angles. But for a dark room with seating directly in front, then the Samsung NU7100 is better due to its higher contrast ratio and better black uniformity. The LG UK6300 also has better reflection handing, and you can place it in a room with many light sources, whereas the Samsung NU7100 can get brighter to fight glare in a bright room.

Samsung NU6900
43" 50" 55" 65" 75"

If you've got a room with wide seating, then the LG UK6300 is a better choice due to the better viewing angles its IPS panel provides. If you're sitting directly in front of the TV, then the Samsung is a better choice. The Samsung NU6900 has better picture quality and is a better choice for movies in a dark room, as it displays deeper blacks due to the higher native contrast ratio and better black uniformity. The NU6900 can get brighter and is slightly better for watching TV shows. The LG UK6300, on the other hand, has better reflection handling for a room with many, but not too bright, lights.

LG UM7300
43" 49" 50" 55" 65"

The LG UM7300 is much better than the LG UK6300. The UM7300 is much brighter than the UK6300, has better black uniformity, and has a faster response time. The UK6300 uses a less accurate RGBW pixel structure, which causes some noticeable artifacts with 4k content, whereas the UM7300 has a standard RGB pixel structure.

LG UJ6300
43" 49" 55" 65"

The LG UK6300 is slightly better than the LG UJ6300. The LG UK6300 is better for watching TV shows and sports as it can get a little brighter, whereas the LG UJ6300 has a marginally better native contrast ratio that gives it better blacks in dark rooms.

Samsung RU7100
43" 50" 55" 58" 65" 75"

These two TVs have different panels types, each with its advantages and disadvantages. The LG UK6300 is more suitable for a wide room, as the image remains accurate at an angle. The Samsung RU7100 has a much higher contrast ratio and can display deeper blacks in a dark room. So if you enjoy movies or HDR movies in a dark room, then it's a better choice provided you sit straight in front. Also, the RU7100 has a 4k resolution, whereas the UK6300 has a slightly different pixel structure, which can cause some strange artifacts in some instances.

Samsung NU7300
55" 65"

The two TVs have different panel types, each with its advantages and disadvantages. If you've got a room with a wide seating arrangement and you'll be watching from the side, then the LG UK6300 is a better choice due to the better viewing angles. If you will be sitting directly in front, then the Samsung NU7300, is a better choice, as it can get brighter and can also deliver much deeper blacks to improve dark room performance. The LG UK6300 has better reflection handing, which is good if your room has many lights.

LG SK8000
49" 55" 65"

The LG SK8000 is much better than the LG UK6300. The LG SK8000 can display judder-free movies from any source and delivers crisper motion thanks to its faster response time. Also, the SK8000 has slightly better reflection handling, which can be important when you watch TV shows in a room with many lights. The LG SK8000 also has a motion interpolation feature to please the soap opera effect fans. The LG UK6300 has slightly lower input lag that matters most for video games.

TCL 6 Series/R617 2018
55" 65" 75"

The two TVs have different panel types, each with its advantages and disadvantages. The LG UK6300 has an IPS panel, so the image remains accurate when viewed from the side, thanks to the wider viewing angles. The TCL R617 has a VA panel and delivers a much better dark room performance with deep blacks, thanks to the high contrast ratio and local dimming support. It can get much brighter in both SDR and in HDR, and can easily fight the glare of a bright room. The R617 has a wide color gamut and can deliver a much better HDR performance.

LG UK6570
70" 75" 86"

The LG UK6570 is much better than the LG UK6300. The UK6570 is much brighter with SDR content and has better color volume. The UK6570 has better motion handling, thanks to a faster response time. Finally, native 4k content looks better on the UK6570 since it doesn't use the less accurate RGBW sub-pixel structure found on the UK6300.

Vizio D Series 4k 2018
43" 55" 60" 65" 70"

These two TVs have different panel types, each with its advantages and disadvantages. If you've got a room with wide seating arrangement, then the LG UK6300 is a better choice thanks to the wide viewing angles of its IPS panel. If you're sitting directly in front of the TV, then the Vizio D Series 4k 2018 is a better choice as it can deliver deeper and more uniform blacks in a dark room and can get brighter to fight glare in a bright room. The LG UK6300, on the other hand, has better reflection handling and has an optional motion interpolation feature to please the Soap Opera Effect fans.

LG B8 OLED
55" 65"

These are two different types of TVs, but the LG B8 is a much better TV than the LG UK6300. The UK6300 has an IPS panel which is immune to burn-in, unlike the OLED panel on the LG B8. On the other hand, the LG B8 has perfect blacks, can get brighter, has better motion handling, has more features to improve the image further, can handle reflections better, and is flicker free.

Hisense H9E Plus
55" 65"

The Hisense H9E Plus is much better than the LG UK6300, unless you need a wide viewing angle. The H9E Plus has a VA type panel, which delivers much better dark room performance thanks to the high native contrast and better black uniformity. The H9E Plus has much clearer motion, as the response time is a lot faster and it can interpolate content up to 120Hz. The LG UK6300 has an IPS panel, which has worse dark room viewing but wider viewing angles, good for a wide seating area or if you want to sit closer to the TV.

TCL 4 Series/S425 2019
43" 49" 50" 55" 65" 75"

These are two different types of TVs. If you have a bright room with a wide seating arrangement, then the LG UK6300 is a better choice as it can get brighter and has wide viewing angles thanks to its IPS panel. The TCL S425, on the other hand, is more suitable if you watch movies in a dark room and you sit straight in front. The TCL S425 has deeper blacks thanks to the higher native contrast ratio. The LG UK6300 has an optional motion interpolation feature to please soap opera effect fans.

Samsung NU8000
49" 55" 65" 75" 82"

These two TVs have different panel types. For a room with a wide seating arrangement, the LG UK6300 might be a better choice if you will often be watching TV from the side. However, the Samsung NU8000 is a much better choice if you will be watching from straight in front. It can get much brighter to fight glare and can also display deeper blacks thanks to its high native contrast ratio. The NU8000 has better gray uniformity and faster response time which makes it great for watching sports. Finally, the NU8000 has FreeSync support and low input lag with motion interpolation, which is great if you are a gamer.

Vizio V Series 2019
40" 43" 43" 50" 55" 55" 60" 65" 65" 70" 75"

The Vizio V Series 2019 and the LG UK6300 have different panels, each with its advantages and disadvantages. The LG has an IPS panel with wider viewing angles and is more suitable if you have a room with a wide seating arrangement. It also supports motion interpolation for the soap opera effect fans. The Vizio, on the other hand, has deeper and more uniform blacks and is a better choice for watching movies in a dark room.

Insignia Fire TV Edition 4k
43" 50" 55"

The LG UK6300 is better than the Insignia Fire TV. The LG has a lower input lag and better viewing angles, which are great if you wish to use the TV as a PC monitor, or you have a room with a wide seating arrangement. The LG also has better reflection handling and can accommodate for more light sources. The Insignia Fire TV, on the other hand, has better blacks and will perform better in a dark room, provided you sit directly in front.

Samsung MU6300
40" 43" 50" 55" 65" 75"

If you've got a large room with wide seating, then the LG UK6300 is a better choice, but for a room with seating directly in front, then the Samsung MU6300 is better. The LG UK6300, apart from the better viewing angles, has a lower input lag and a faster response time that is great for gamers. It can handle reflections better, which is great if you have a room with many small windows. The Samsung MU6300 has better blacks due to higher native contrast ratio and better black uniformity. Finally, the Samsung MU6300 can get brighter and can fight ambient glare better.

TCL 3 Series/S325 2019
32" 32" 40" 43" 49"

The LG UK6300 and the TCL 3 Series S325 have different panels, each with their advantages and disadvantages. The TCL has a VA panel and it is more suitable for a dark room as it can display deeper blacks, but you have to sit straight in front to enjoy the most accurate image. The LG, on the other hand, is better for a wide seating arrangement as the image remains accurate for wider angles thanks to its IPS panel. The LG supports HDR and 4k resolution, although it has the RGBW pixel pattern which does result in some artifacts.

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Conclusion
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7.1 Mixed Usage
The LG UK6300 is a decent TV for mixed usage. It has decent picture quality and a passable viewing angle, but it isn't able to overcome glare in a bright room and has poor dark room performance. It has a good smart interface and extraordinarily low input lag.
5.9 Movies
Not a good choice for movie lovers. It doesn't get very bright. Blacks aren't truly black and it has poor uniformity, so letterbox bars look cloudy. Subtitles don't look good due to the lack of a local dimming feature.
7.7 TV Shows
The LG UK6300 is good for watching TV Shows. Low frame rate content looks great. The TV isn't bright enough to be used in a bright room as it can't overcome glare, so daytime viewing is somewhat compromised. It has a good smart interface with a wide assortment of apps available for watching streaming TV.
7.4 Sports
Decent TV for watching sports. There is some dirty screen effect visible in the center of the screen, but it shouldn't be very noticeable. It has a good viewing angle great for game day parties, although it isn't very bright which might be an issue for daytime games in a bright living room. It has a good response time, so fast-paced sports don't have much motion trail.
7.9 Video Games
Good TV for video games, mainly due to the excellent low input lag when game mode is used. The TV has a good response time, so there is very little motion blur. It has decent picture quality, but some games suffer from the low contrast ratio.
5.6 HDR Movies
Disappointing HDR Movie experience. It has a poor native contrast and no local dimming feature. It doesn't support a wide color gamut and can't produce deep dark colors. There is almost no advantage to watching in HDR on the UK6300.
7.3 HDR Gaming
Decent HDR Gaming performance. Exceptional low input lag, and the response time is good, so there is very little motion trail. The mediocre peak brightness and lack of a wide color gamut means the HDR effect is not very noticeable.
8.0 PC Monitor