Notice: Your browser is not supported or outdated so some features of the site might not be available.
Products
LG C4 OLED
TCL QM751G
Tested using Methodology v2.0.1
Updated Aug 12, 2025 01:39 PM
SEE PRICE
Walmart.comTested using Methodology v2.0.1
Updated Jul 28, 2025 02:45 PM
SEE PRICE
Amazon.com
Resolution4k
Native Refresh Rate144Hz
TypeOLED
Sub-TypeWOLED
Dolby VisionYes
Screen FinishGlossy
Resolution4k
Native Refresh Rate144Hz
TypeLED
Sub-TypeVA
Dolby VisionYes
Screen FinishGlossy
Our Verdict
LG C4 OLED
TCL QM751G
The LG C4 OLED is better than the TCL QM751G. The TCL is brighter in HDR and is especially brighter in SDR, but the LG has better reflection handling, so you don't get the full impact of the TCL's brightness if you're using it in a room with a lot of glare. While the TCL has outstanding contrast, it just can't match the perfect blacks of OLEDs, which look amazing in darker rooms. The LG is a better choice if you care about accuracy, as it's more accurate in HDR and SDR out of the box. Finally, if you're a gamer, the LG is also a better choice due to its nearly instantaneous response time and four 4k @ 144Hz HDMI ports, while the TCL has one 144Hz port and one 120Hz port.
Variants
- OLED42C4PUA (42")
- OLED48C4PUA (48")
- OLED55C4PUA (55")
- OLED65C4PUA (65")
- OLED77C4PUA (77")
- OLED83C4PUA (83")
- 55QM751G (55")
- 65QM751G (65")
- 75QM751G (75")
- 85QM751G (85")
- 98QM751G (98")
Check Price
42"
OLED42C4PUA
Searching
Finding store42"
48"
OLED48C4PUA
Searching
Finding store48"
55"
OLED55C4PUA
Searching
Finding store55"
55QM751G
Searching
Finding store65"
OLED65C4PUA
Searching
Finding store65"
65QM751G
Searching
Finding store75"
75"
75QM751G
Searching
Finding store77"
OLED77C4PUA
Searching
Finding store77"
83"
OLED83C4PUA
Searching
Finding store83"
85"
85"
85QM751G
Searching
Finding store98"
98"
98QM751G
Searching
Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
8.3
7.8
SDR Brightness
6.5
8.6
Contrast
10
8.2
HDR Brightness
7.7
8.1
Lighting Zone Precision
10
7.5
Full Comparison
Brightness
HDR Brightness
7.7
8.1
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
804 cd/m²
828 cd/m²
Yellow Skyscraper (~700 cd/m²)
590 cd/m²
397 cd/m²
Landscape Pool (~300 cd/m²)
265 cd/m²
299 cd/m²
Peak 2% Window
950 cd/m²
1,315 cd/m²
Peak 10% Window
932 cd/m²
1,555 cd/m²
Peak 25% Window
614 cd/m²
1,449 cd/m²
Peak 50% Window
331 cd/m²
899 cd/m²
Peak 100% Window
194 cd/m²
564 cd/m²
Sustained 2% Window
917 cd/m²
1,115 cd/m²
Sustained 10% Window
905 cd/m²
1,527 cd/m²
Sustained 25% Window
582 cd/m²
1,428 cd/m²
Sustained 50% Window
328 cd/m²
897 cd/m²
Sustained 100% Window
192 cd/m²
564 cd/m²
Automatic Brightness Limiting (ABL)
0.096
0.052
HDR Brightness In Game Mode
6.7
8.0
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
798 cd/m²
796 cd/m²
Yellow Skyscraper (~700 cd/m²)
415 cd/m²
400 cd/m²
Landscape Pool (~300 cd/m²)
165 cd/m²
293 cd/m²
Peak 2% Window
920 cd/m²
1,297 cd/m²
Peak 10% Window
923 cd/m²
1,466 cd/m²
Peak 25% Window
491 cd/m²
1,378 cd/m²
Peak 50% Window
296 cd/m²
862 cd/m²
Peak 100% Window
196 cd/m²
543 cd/m²
Sustained 2% Window
891 cd/m²
1,098 cd/m²
Sustained 10% Window
894 cd/m²
1,443 cd/m²
Sustained 25% Window
472 cd/m²
1,364 cd/m²
Sustained 50% Window
294 cd/m²
860 cd/m²
Sustained 100% Window
195 cd/m²
542 cd/m²
Automatic Brightness Limiting (ABL)
0.097
0.052
SDR Brightness
6.5
8.6
Real Scene Peak Brightness
411 cd/m²
604 cd/m²
Peak 2% Window
427 cd/m²
1,222 cd/m²
Peak 10% Window
425 cd/m²
1,509 cd/m²
Peak 25% Window
405 cd/m²
1,406 cd/m²
Peak 50% Window
382 cd/m²
844 cd/m²
Peak 100% Window
259 cd/m²
532 cd/m²
Sustained 2% Window
420 cd/m²
1,031 cd/m²
Sustained 10% Window
420 cd/m²
1,487 cd/m²
Sustained 25% Window
401 cd/m²
1,329 cd/m²
Sustained 50% Window
379 cd/m²
840 cd/m²
Sustained 100% Window
258 cd/m²
531 cd/m²
Automatic Brightness Limiting (ABL)
0.030
0.053
Black Level
Contrast
10
8.2
Contrast Picture
Contrast
Inf : 1
135,500 : 1
Native Contrast
Inf : 1
5,651 : 1
Lighting Zone Precision
10
7.5
Lighting Zone Precision Picture
Lighting Zone Transitions
10
8.0
Preferred LD Video, Moving Object
Local Dimming
No
Yes
Backlight
No Backlight
Full-Array
Dimming Zone Count Of The Tested TV
8,294,400
1,248
Contrast And Dark Details In Game Mode
9.5
8.0
Lighting Zone Precision Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
Black Uniformity
10
9.5
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
N/A
0.269%
Native Black Uniformity Picture
Native Std. Dev.
0.144%
0.420%
Color
SDR Color Volume
7.9
8.0
DCI-P3 Gamut Rings
CIELAB DCI-P3 Coverage
93.69%
92.27%
BT.2020 Gamut Rings
CIELAB BT.2020 Coverage
62.82%
70.17%
HDR Color Volume
7.6
8.5
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
79.2%
82.8%
2020 Color Volume ITP Picture
10,000 cd/m² BT.2020 Coverage ITP
36.2%
44.8%
White Luminance
1,008 cd/m²
1,199 cd/m²
Red Luminance
104 cd/m²
291 cd/m²
Green Luminance
333 cd/m²
826 cd/m²
Blue Luminance
38 cd/m²
91 cd/m²
Cyan Luminance
365 cd/m²
920 cd/m²
Magenta Luminance
134 cd/m²
383 cd/m²
Yellow Luminance
425 cd/m²
1,117 cd/m²
SDR Pre-Calibration Color Accuracy
8.7
5.2
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE 2000
1.61
6.27
Color dE 2000
0.97
3.22
Gamma
2.19
2.20
Color Temperature
6,262 K
5,794 K
Picture Mode
Expert (Dark Space)
Movie
Color Temp Setting
Warm 50
Warm -5
Gamma Setting
2.2
2.2
SDR Post-Calibration Color Accuracy
9.7
9.7
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE 2000
0.26
0.40
Color dE 2000
0.62
0.48
Gamma
2.20
2.21
Color Temperature
6,460 K
6,470 K
White Balance Calibration
22 point
20 point
Color Calibration
Yes
Yes
HDR Pre-Calibration Color Accuracy
8.9
7.0
HDR Pre White Balance Picture
HDR Pre Color Picture
White Balance dE ITP
3.95
14.66
Color dE ITP
5.3
19.2
Color Temperature
6,303 K
6,534 K
Picture Mode
Cinema
Movie
HDR Post-Calibration Color Accuracy
9.4
9.2
HDR Post White Balance Picture
HDR Post Color Picture
White Balance dE ITP
2.50
2.86
Color dE ITP
5.00
4.70
Color Temperature
6,474 K
6,358 K
Processing
PQ EOTF Tracking
8.8
5.3
PQ EOTF Graph
600 Nit Tracking Delta
0.0033
0.0156
1000 Nit Tracking Delta
0.0033
0.0155
4000 Nit Tracking Delta
0.0039
0.0156
Low-Quality Content Smoothing
8.6
8.1
Low-Quality Content Smoothing Picture
Smoothing
9.0
8.5
Detail Preservation
7.5
7.0
Upscaling: Sharpness Processing
8.0
7.5
Sharpness Picture - 480p
HDR Native Gradient
7.8
7.5
HDR Gradient Picture
100% Black To 50% Gray
6.0
6.0
50% Gray To 100% White
6.0
6.0
100% Black To 50% Red
8.0
8.0
50% Red To 100% Red
10
8.0
100% Black To 50% Green
8.0
8.0
50% Green To 100% Green
6.0
8.0
100% Black To 50% Blue
10
8.0
50% Blue To 100% Blue
8.0
8.0
Game Mode Responsiveness
Input Lag
9.0
8.3
1080p @ 60Hz
10.0 ms
14.3 ms
1080p @ 60Hz Outside Game Mode
89.6 ms
125.2 ms
1080p @ 120Hz
5.3 ms
6.4 ms
1080p @ Max Refresh Rate
4.6 ms
8.1 ms
4k @ 60Hz
9.9 ms
14.4 ms
4k @ 60Hz @ 4:4:4
9.9 ms
14.8 ms
4k @ 60Hz Outside Game Mode
89.5 ms
124.9 ms
4k @ 60Hz With Interpolation
85.5 ms
116.9 ms
4k @ 120Hz
5.3 ms
6.0 ms
4k @ Max Refresh Rate
4.6 ms
5.2 ms
8k @ 60Hz
N/A
N/A
Supported Resolutions
9.4
9.5
Resolution
4k
4k
480p @ 59.94Hz (Widescreen)
Yes
Yes
720p @ 59.94Hz
Yes
Yes
1080p @ 60Hz @ 4:4:4
Yes
Yes
1080p @ 120Hz
Yes
Yes
1080p Maximum Refresh Rate
144 Hz
240 Hz
4k @ 60Hz
Yes
Yes
4k @ 60Hz @ 4:4:4
Yes
Yes
4k @ 120Hz
Yes
Yes
4k @ 120Hz @ 4:4:4
Yes
Yes
4k Maximum Refresh Rate
144 Hz
144 Hz
8k @ 30Hz Or 24Hz
No
No
8k @ 60Hz
No
No
Variable Refresh Rate
8.5
8.8
Native Refresh Rate
144Hz
144Hz
Variable Refresh Rate
Yes
Yes
HDMI Forum VRR
Yes
Yes
FreeSync
Yes
Yes
G-SYNC Compatible
Yes (NVIDIA Certified)
Yes
4k VRR Maximum
144 Hz
144 Hz
4k VRR Minimum
< 20 Hz
< 20 Hz
1080p VRR Maximum
144 Hz
240 Hz
1080p VRR Minimum
< 20 Hz
< 20 Hz
VRR + Local Dimming
No Local Dimming
Yes
CAD In Game Mode @ Max Refresh Rate
9.6
6.7
Pursuit Photo Max Refresh
CAD Heatmap Max Refresh
Transition At Max Refresh
0 to 31
0 to 31
Avg. CAD
39
225
Best 10% CAD
7
121
Worst 10% CAD
106
357
CAD In Game Mode @ 120Hz
9.7
6.8
Pursuit Photo 120Hz
CAD Heatmap 120Hz
Transition At 120Hz
0 to 31
0 to 31
Avg. CAD
35
212
Best 10% CAD
6
86
Worst 10% CAD
94
460
CAD In Game Mode @ 60Hz
9.6
6.8
Pursuit Photo 60Hz
CAD Heatmap 60Hz
Transition 60Hz
0 to 31
0 to 31
Avg. CAD
45
212
Best 10% CAD
6
85
Worst 10% CAD
132
457
PS5 Compatibility
PS5 Screenshot
Auto Low Latency Mode (ALLM)
Yes
Yes
4k @ 120Hz
Yes
Yes
1440p @ 120Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
HDR
Yes
Yes
VRR
Yes
Yes
Xbox Series X|S Compatibility
Xbox Series X Screenshot
Auto Low Latency Mode (ALLM)
Yes
Yes
4k @ 120Hz
Yes
Yes
1440p @ 120Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
HDR
Yes
Yes
VRR
Yes
Yes
Motion Handling
Stutter
4.2
6.4
Frame Hold Time @ 24 fps
41.3 ms
35.4 ms
Frame Hold Time @ 60 fps
16.3 ms
10.4 ms
24p Judder
10
10
Judder-Free 24p
Yes
Yes
Judder-Free 24p via 60p
Yes
Yes
Judder-Free 24p via 60i
Yes
Yes
Judder-Free 24p via Native Apps
Yes
Yes
Response Time
9.6
8.0
Pursuit Photo 60Hz
Response Time Heatmap 60Hz
Transition At 60Hz
0 to 31
0 to 31
First Response Time
0.4 ms
6.3 ms
Total Response Time
3.9 ms
10.0 ms
Worst 10% Response Time
10.3 ms
21.8 ms
Flicker
Backlight chart
Flicker-Free
No
No
PWM Dimming Frequency
0 Hz
10,000 Hz
Black Frame Insertion (BFI)
BFI Picture
BFI Frequency Picture
Optional BFI
Yes
Yes
Min Flicker For 60 fps
60 Hz
60 Hz
60Hz For 60 fps
Yes
Yes
120Hz For 120 fps
No
Yes
Min Flicker For 60 fps In Game Mode
60 Hz
60 Hz
Motion Interpolation
Motion Interpolation (30 fps) Picture
Motion Interpolation (30 fps)
Yes
Yes
Motion Interpolation (60 fps) Picture
Motion Interpolation (60 fps)
Yes
Yes
Reflections
Direct Reflections
6.5
5.3
Ring Light Picture
Direct Reflections Graph
Peak Direct Reflection Intensity
42.4%
67.1%
Screen Finish
Glossy
Glossy
Ambient Black Level Raise
9.3
9.1
Black Level Raise Picture
Bright Room Black Level Raise Graph
Black Luminance @ 0 lx
0.00 cd/m²
0.00 cd/m²
Black Luminance @ 1000 lx
0.24 cd/m²
0.38 cd/m²
Total Reflected Light
8.8
5.9
Bright Room Off Picture
Ring Picture Total Reflection
Total Reflected Light Intensity
7,717% ⋅ pixel
27,092% ⋅ pixel
Diffraction Artifacts
No
Yes
Ambient Color Saturation
7.2
8.5
Bright Room Color Volume Graph
Low-Luminance Colors @ 1000 lx
65.68%
71.10%
Mid-Luminance Colors @ 1000 lx
56.69%
71.77%
High-Luminance Colors @ 1000 lx
37.68%
67.56%
Panel
Viewing Angle
8.9
6.7
Viewing Angle Video
Chroma Graph
Color Washout
48°
23°
Hue Graph
Color Shift
27°
65°
Lightness Graph
Brightness Loss
70°
30°
Black Level Raise
70°
18°
Gamma Shift
70°
20°
Gray Uniformity
8.1
6.5
50% Uniformity Picture
50% Std. Dev.
1.063%
3.346%
50% DSE
0.120%
0.182%
5% Uniformity Picture
5% Std. Dev.
0.323%
1.050%
5% DSE
0.102%
0.084%
Panel Technology
Spectral Power Distribution
Pixels Picture
Type
OLED
LED
Sub-Type
WOLED
VA
Subpixel Layout
RWBG
BGR
Inputs
Input Specifications
Side Inputs Picture
Rear Inputs Picture
HDMI
4 (4x HDMI 2.1)
4 (2x HDMI 2.0, 2x HDMI 2.1)
HDMI 2.1 Rated Speed
48 Gbps
48 Gbps
ATSC Tuner
1.0
1.0
USB Ports
3
2
USB 3.0
No
Yes (1)
Audio Out 3.5mm
0
1
Wi-Fi
Yes (2.4 GHz, 5 GHz)
Yes (2.4 GHz, 5 GHz)
Ethernet Speed
100 Mbps
100 Mbps
Composite In
0
1 (Adapter Required, Not Incl.)
Digital Optical Audio Out
1
1
Audio Passthrough
ARC/eARC Port
eARC
eARC
eARC: Dolby Atmos Over Dolby Digital Plus
Yes
Yes
eARC: Dolby Digital Plus 7.1
Yes
Yes
eARC: LPCM 7.1 Over Dolby MAT
Yes
Yes
eARC: Dolby TrueHD 7.1
Yes
Yes
eARC: DTS:X Over DTS-HD MA
Yes
Yes
eARC: DTS-HD Master Audio 7.1
Yes
Yes
eARC: LPCM Channels (Bitstream)
7.1
7.1
ARC: Dolby Digital 5.1
Yes
Yes
ARC: DTS 5.1
Yes
Yes
Optical: Dolby Digital 5.1
Yes
Yes
Optical: DTS 5.1
Yes
Yes
HDR Format Support
HDR10
Yes
Yes
HDR10+
No
Yes
Dolby Vision
Yes
Yes
HLG
Yes
Yes
Design
Style
Design Picture
Curved
No
No
Stand
Stand Picture
Back
Back Picture
Wall Mount
VESA 300x200
VESA 400x400
Borders
Borders Picture
Borders
0.24" (0.6 cm)
0.31" (0.8 cm)
Thickness
Thickness Picture
Max Thickness
1.77" (4.5 cm)
3.11" (7.9 cm)
Build Quality
9.0
8.0
Build quality picture
Smart Features
Interface
Smart TV Picture
Smart OS
webOS
Google TV
Version
24
12
Ad-Free
0.0
0.0
Ads Picture
Ads
Yes
Yes
Opt-out
No
No
Suggested Content in Home
No
Yes
Opt-out of Suggested Content
No
No
Remote
Remote Picture
Voice Control
Yes
Yes
TV Controls
Controls Picture
Mute Switch
Yes
Yes
In The Box
In The Box Picture
Misc
Power Consumption
78 W
70 W
Power Consumption (Max)
215 W
309 W
Firmware
03.10.31
V8-T653T02-LF1V097
Sound Quality
Frequency Response
6.7
6.6
Frequency Response
Low-Frequency Extension
80.00 Hz
119.87 Hz
Std. Dev. @ 70
1.18 dB
3.63 dB
Std. Dev. @ 80
1.68 dB
3.64 dB
Std. Dev. @ Max
5.56 dB
4.40 dB
Max
84.2 dB SPL
85.9 dB SPL
Dynamic Range Compression
5.13 dB
1.69 dB
Digital Room Correction
Yes
No
Check Price
42"
OLED42C4PUA
Searching
Finding store42"
48"
OLED48C4PUA
Searching
Finding store48"
55"
OLED55C4PUA
Searching
Finding store55"
55QM751G
Searching
Finding store65"
OLED65C4PUA
Searching
Finding store65"
65QM751G
Searching
Finding store75"
75"
75QM751G
Searching
Finding store77"
OLED77C4PUA
Searching
Finding store77"
83"
OLED83C4PUA
Searching
Finding store83"
85"
85"
85QM751G
Searching
Finding store98"
98"
98QM751G
Searching
Finding store
LG C4 OLED
TCL QM751G
Comments
LG C4 OLED vs TCL QM751G: Main Discussion
What do you think of these products? Let us know below.
Looking for a personalized buying advice from the RTINGS.com experts? Insiders have direct access to buying advice on our insider forum.