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Products
TCL Q750G
TCL S551G
Tested using Methodology v1.11
Updated Apr 14, 2025 07:22 PM
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Amazon.comTested using Methodology v1.11
Updated Jul 28, 2025 02:59 PM
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LG.com
Resolution4k
TypeLED
Sub-TypeVA
Resolution4k
TypeLED
Sub-TypeVA
Our Verdict
TCL Q7/Q750G QLED
TCL S551G
The TCL Q750G is far better than the TCL S551G. While the cheaper S551G has some advantages, namely slightly better accuracy, the Q750G is a higher-tier product, and it shows: far brighter, better contrast, more colorful, and improved image processing. It also has many more gaming features. Overall, unless you want to save some money, the Q750G is the pick.
Variants
- 55Q750G (55")
- 65Q750G (65")
- 75Q750G (75")
- 85Q750G (85")
- 43S551G (43")
- 50S551G (50")
- 55S551G (55")
- 65S551G (65")
- 75S551G (75")
- 85S551G (85")
Check Price
43"
43"
43S551G
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50"
50S551G
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55Q750G
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55S551G
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65Q750G
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65S551G
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75Q750G
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75S551G
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85Q750G
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85S551G
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Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.9
7.2
Contrast
9.3
6.7
Low-Quality Content Smoothing
8.1
6.0
Pre Calibration
4.6
6.1
Upscaling: Sharpness Processing
7.5
5.5
HDR Brightness
7.6
5.9
Full Comparison
Design
Style
Design Picture
Curved
No
No
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Stand
Stand Picture
Back
Back Picture
Wall Mount
VESA 300x300
VESA 400x400
Borders
Borders Picture
Borders
0.31" (0.8 cm)
0.33" (0.9 cm)
Thickness
Thickness Picture
Max Thickness
2.76" (7.0 cm)
2.60" (6.6 cm)
Build Quality
7.5
7.0
Build quality picture
Picture Quality
Contrast
9.3
6.7
Contrast Picture
Contrast
80,160 : 1
6,766 : 1
Native Contrast
9,614 : 1
6,766 : 1
Blooming
7.5
10
Blooming Photo
Lighting Zone Transitions
7.0
10
Preferred LD Video, Moving Object
Local Dimming
Yes
No
Backlight
Full-Array
Direct
Dimming Zones Count Of Tested TV
160
N/A
Contrast And Dark Details In Game Mode
9.0
7.0
Blooming Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
HDR Brightness
7.6
5.9
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
497 cd/m²
304 cd/m²
Yellow Skyscraper (~700 cd/m²)
275 cd/m²
217 cd/m²
Landscape Pool (~300 cd/m²)
270 cd/m²
159 cd/m²
Peak 2% Window
381 cd/m²
355 cd/m²
Peak 10% Window
685 cd/m²
355 cd/m²
Peak 25% Window
926 cd/m²
355 cd/m²
Peak 50% Window
810 cd/m²
355 cd/m²
Peak 100% Window
565 cd/m²
355 cd/m²
Sustained 2% Window
372 cd/m²
355 cd/m²
Sustained 10% Window
663 cd/m²
355 cd/m²
Sustained 25% Window
796 cd/m²
355 cd/m²
Sustained 50% Window
801 cd/m²
355 cd/m²
Sustained 100% Window
565 cd/m²
355 cd/m²
Automatic Brightness Limiting (ABL)
0.044
0.000
HDR Brightness In Game Mode
7.8
5.9
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
523 cd/m²
306 cd/m²
Yellow Skyscraper (~700 cd/m²)
302 cd/m²
217 cd/m²
Landscape Pool (~300 cd/m²)
309 cd/m²
161 cd/m²
Peak 2% Window
410 cd/m²
355 cd/m²
Peak 10% Window
854 cd/m²
356 cd/m²
Peak 25% Window
1,008 cd/m²
356 cd/m²
Peak 50% Window
864 cd/m²
356 cd/m²
Peak 100% Window
604 cd/m²
355 cd/m²
Sustained 2% Window
403 cd/m²
355 cd/m²
Sustained 10% Window
711 cd/m²
356 cd/m²
Sustained 25% Window
866 cd/m²
356 cd/m²
Sustained 50% Window
855 cd/m²
355 cd/m²
Sustained 100% Window
603 cd/m²
355 cd/m²
Automatic Brightness Limiting (ABL)
0.043
0.000
PQ EOTF Tracking
8.4
9.0
PQ EOTF Graph
600 Nit Tracking Delta
0.0102
0.0067
1000 Nit Tracking Delta
0.0104
0.0067
4000 Nit Tracking Delta
0.0107
0.0067
SDR Brightness
8.5
7.0
Real Scene Peak Brightness
546 cd/m²
310 cd/m²
Peak 2% Window
395 cd/m²
358 cd/m²
Peak 10% Window
757 cd/m²
353 cd/m²
Peak 25% Window
888 cd/m²
350 cd/m²
Peak 50% Window
780 cd/m²
347 cd/m²
Peak 100% Window
548 cd/m²
346 cd/m²
Sustained 2% Window
384 cd/m²
356 cd/m²
Sustained 10% Window
642 cd/m²
352 cd/m²
Sustained 25% Window
764 cd/m²
348 cd/m²
Sustained 50% Window
773 cd/m²
347 cd/m²
Sustained 100% Window
544 cd/m²
345 cd/m²
Automatic Brightness Limiting (ABL)
0.040
0.002
Color Gamut
8.3
8.0
Wide Color Gamut
Yes
Yes
Color Gamut DCI-P3 Picture
DCI P3 xy
92.69%
88.94%
DCI P3 uv
96.12%
94.52%
Color Gamut Rec.2020 Picture
Rec 2020 xy
67.74%
64.85%
Rec 2020 uv
73.00%
71.16%
Color Volume
7.4
7.1
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
64.0%
57.8%
2020 Color Volume ITP Picture
10,000 cd/m² Rec 2020 Coverage ITP
28.7%
26.2%
White Luminance
375 cd/m²
355 cd/m²
Red Luminance
82 cd/m²
75 cd/m²
Green Luminance
282 cd/m²
253 cd/m²
Blue Luminance
34 cd/m²
26 cd/m²
Cyan Luminance
310 cd/m²
279 cd/m²
Magenta Luminance
108 cd/m²
101 cd/m²
Yellow Luminance
341 cd/m²
327 cd/m²
Pre Calibration
4.6
6.1
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE
7.61
5.82
Color dE
3.87
2.79
Gamma
2.11
2.15
Color Temperature
6,500 K
6,199 K
Picture Mode
Movie
Movie
Color Temp Setting
Warm
Warm -5
Gamma Setting
2.2
2.2
Post Calibration
9.4
9.5
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE
0.71
0.15
Color dE
1.05
1.35
Gamma
2.20
2.20
Color Temperature
6,481 K
6,509 K
White Balance Calibration
20 point
20 point
Color Calibration
Yes
Yes
Gray Uniformity
7.6
7.0
50% Uniformity Picture
50% Std. Dev.
4.145%
4.153%
50% DSE
0.174%
0.221%
5% Uniformity Picture
5% Std. Dev.
0.550%
0.732%
5% DSE
0.075%
0.079%
Black Uniformity
9.7
10
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
0.430%
N/A
Native Black Uniformity Picture
Native Std. Dev.
0.597%
0.284%
Viewing Angle
5.3
6.1
Viewing Angle Video
Chroma Graph
Color Washout
24°
33°
Hue Graph
Color Shift
34°
54°
Lightness Graph
Brightness Loss
29°
39°
Black Level Raise
17°
18°
Gamma Shift
15°
16°
Reflections
7.1
7.6
Reflections Picture
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Semi-gloss
Semi-gloss
Total Reflections
5.9%
4.8%
Indirect Reflections
0.9%
0.6%
Calculated Direct Reflections
5.0%
4.2%
HDR Native Gradient
7.5
6.8
HDR Gradient Picture
100% Black to 50% Gray
6.0
6.0
50% Gray to 100% White
6.0
8.0
100% Black to 50% Red
8.0
6.0
50% Red to 100% Red
10
8.0
100% Black to 50% Green
8.0
4.0
50% Green to 100% Green
6.0
8.0
100% Black to 50% Blue
8.0
6.0
50% Blue to 100% Blue
8.0
8.0
Low-Quality Content Smoothing
8.1
6.0
Low-Quality Content Smoothing Picture
Smoothing
9.0
5.5
Detail Preservation
6.0
7.0
Upscaling: Sharpness Processing
7.5
5.5
Sharpness Picture - 480p
Pixels
Pixels Picture
Subpixel Layout
BGR
BGR
Type
LED
LED
Sub-Type
VA
VA
Motion
Response Time
8.3
7.9
Motion Blur Picture
Response Time Chart
80% Response Time
4.2 ms
4.8 ms
100% Response Time
10.8 ms
13.1 ms
Flicker-Free
9.9
2.1
Backlight chart
Flicker-Free
No
No
PWM Dimming Frequency
960 Hz
150 Hz
Black Frame Insertion (BFI)
BFI Picture
BFI Frequency Picture
Optional BFI
Yes
No
Min Flicker For 60 fps
60 Hz
150 Hz
60Hz For 60 fps
Yes
No
120Hz For 120 fps
Yes
No
Min Flicker for 60 fps in Game Mode
60 Hz
150 Hz
Motion Interpolation
Motion Interpolation (30 fps) Picture
Motion Interpolation (30 fps)
Yes
Yes
Motion Interpolation (60 fps) Picture
Motion Interpolation (60 fps)
Yes
No
Stutter
6.9
7.4
Frame Hold Time @ 24 fps
30.9 ms
28.6 ms
Frame Hold Time @ 60 fps
5.9 ms
3.6 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
Variable Refresh Rate
9.6
8.2
Native Refresh Rate
144 Hz
60 Hz
Variable Refresh Rate
Yes
Yes
HDMI Forum VRR
Yes
Yes
FreeSync
Yes
Yes
G-SYNC Compatible
Yes
Yes
4k VRR Maximum
144 Hz
60 Hz
4k VRR Minimum
< 20 Hz
48 Hz
1080p VRR Maximum
240 Hz
120 Hz
1080p VRR Minimum
< 20 Hz
< 20 Hz
1440p VRR Maximum
144 Hz
120 Hz
1440p VRR Minimum
< 20 Hz
< 20 Hz
VRR + Local Dimming
Yes
No Local Dimming
Inputs
Input Lag
9.3
9.7
1080p @ 60Hz
17.1 ms
10.5 ms
1080p @ 60Hz Outside Game Mode
126.6 ms
161.7 ms
1080p @ 120Hz
6.4 ms
6.6 ms
1080p @ 144Hz
16.5 ms
N/A
1440p @ 60Hz
14.2 ms
10.7 ms
1440p @ 120Hz
9.8 ms
6.4 ms
1440p @ 144Hz
17.2 ms
N/A
4k @ 60Hz
14.4 ms
10.5 ms
4k @ 60Hz + 10-Bit HDR
14.3 ms
10.4 ms
4k @ 60Hz @ 4:4:4
26.7 ms
10.5 ms
4k @ 60Hz Outside Game Mode
126.4 ms
160.9 ms
4k @ 60Hz With Interpolation
126.3 ms
160.8 ms
4k @ 120Hz
6.2 ms
N/A
4k @ 144Hz
20.8 ms
N/A
8k @ 60Hz
N/A
N/A
Supported Resolutions
9.3
8.2
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 @ 144Hz
Yes
No
1440p @ 60Hz
Yes (forced resolution required)
Yes (forced resolution required)
1440p @ 120Hz
Yes
Yes
1440p @ 144Hz
Yes
No
4k @ 60Hz
Yes
Yes
4k @ 60Hz @ 4:4:4
Yes
Yes
4k @ 120Hz
Yes
No
4k @ 120Hz @ 4:4:4
No
No
4k @ 144Hz
Yes
No
8k @ 30Hz or 24Hz
No
No
8k @ 60Hz
No
No
PS5 Compatibility
PS5 Screenshot
Auto Low Latency Mode (ALLM)
Yes
Yes
4k @ 120Hz
Yes
No
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
No
1440p @ 120Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
HDR
Yes
Yes
VRR
Yes
Yes
Inputs Specifications
HDR10
Yes
Yes
HDR10+
Yes
Yes
Dolby Vision
Yes
Yes
HLG
Yes
Yes
HDMI 2.0 Full Bandwidth
Yes (HDMI 1,2,3,4)
Yes (HDMI 1,2,3)
HDMI 2.1 Class Bandwidth
Yes (HDMI 1,2)
No
CEC
Yes
Yes
HDCP 2.2
Yes (HDMI 1,2,3,4)
Yes (HDMI 1,2,3)
ATSC Tuner
1.0
1.0
USB 3.0
No
No
Variable Analog Audio Out
Yes
Yes
Wi-Fi Support
Yes (2.4 GHz, 5 GHz)
Yes (2.4 GHz, 5 GHz)
Input Photos
Side Inputs Picture
Rear Inputs Picture
Total Inputs
HDMI
4
3
USB
1
1
Digital Optical Audio Out
1
1
Analog Audio Out 3.5mm
1
1
Analog Audio Out RCA
0
0
Component In
0
0
Composite In
1 (adapter required, not incl.)
1 (adapter required, not incl.)
Tuner (Cable/Ant)
1
1
Ethernet
1
1
DisplayPort
0
0
IR In
0
0
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)
2.0
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
Sound Quality
Frequency Response
6.6
6.3
Frequency Response
Low-Frequency Extension
100.79 Hz
134.54 Hz
Std. Dev. @ 70
3.22 dB
3.96 dB
Std. Dev. @ 80
3.49 dB
4.01 dB
Std. Dev. @ Max
5.15 dB
4.52 dB
Max
85.9 dB SPL
87.2 dB SPL
Dynamic Range Compression
3.18 dB
2.53 dB
Distortion
6.7
7.3
Total Harmonic Distortion
Weighted THD @ 80
0.152
0.045
Weighted THD @ Max
0.419
0.222
IMD @ 80
3.87%
2.10%
IMD @ Max
18.55%
10.47%
Smart Features
Interface
8.0
8.0
Smart TV Picture
Smart OS
Google TV
Google TV
Version
11
12
Ease of Use
Average
Average
Smoothness
Very Smooth
Very Smooth
Time Taken to Select YouTube
1 s
1 s
Time Taken to Change Backlight
2 s
2 s
Advanced Options
Many
Many
Ad-Free
0.0
0.0
Ads Picture
Ads
Yes
Yes
Opt-out
No
No
Suggested Content in Home
Yes
Yes
Opt-out of Suggested Content
No
No
Apps and Features
9.0
9.0
Apps Picture
App Selection
Great
Great
App Smoothness
Very Smooth
Very Smooth
Cast Capable
Yes
Yes
USB Drive Playback
Yes
Yes
USB Drive HDR Playback
Yes
Yes
HDR in Netflix
Yes
Yes
HDR in YouTube
Yes
Yes
Remote
8.5
8.5
Remote Picture
Size
Medium
Medium
Voice Control
Many Features
Many Features
CEC Menu Control
Yes
Yes
Other Smart Features
No
No
Remote App
Android TV
Android TV
TV Controls
Controls Picture
In The Box
In The Box Picture
Misc
Power Consumption
57 W
54 W
Power Consumption (Max)
196 W
188 W
Firmware
V8-T615T02-LF1V283.000808
V8-R75PT01-LF1V174
Check Price
43"
43"
43S551G
Searching
Finding store50"
50"
50S551G
Searching
Finding store55"
55Q750G
Searching
Finding store55"
55S551G
Searching
Finding store65"
65Q750G
Searching
Finding store65"
65S551G
Searching
Finding store75"
75Q750G
Searching
Finding store75"
75S551G
Searching
Finding store85"
85Q750G
Searching
Finding store85"
85S551G
Searching
Finding store
TCL Q7/Q750G QLED
TCL S551G
Comments
TCL Q750G vs TCL S551G: Main Discussion
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