Products
TCL S551G
Hisense QD7N
Tested using Methodology v2.0.1
Updated Sep 24, 2025 08:56 PM
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Tested using Methodology v2.0.1
Updated Nov 21, 2025 09:07 PM
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Resolution4k
Native Refresh Rate
60Hz
TypeLED
Sub-Type
VA
Dolby Vision
Yes
Screen Finish
Glossy
Resolution4k
Native Refresh Rate
144Hz
TypeLED
Sub-Type
IPS
Dolby Vision
Yes
Screen Finish
Glossy
Our Verdict
TCL S551G
Hisense QD7N
The Hisense QD7N is better overall than the TCL S551G. While it's a bit pricier and has a worse contrast ratio, it gets noticeably brighter and offers more advanced gaming features, including HDMI 2.1 bandwidth for gaming up to 4k @ 144Hz.
Variants
- 43S551G (43")
- 50S551G (50")
- 55S551G (55")
- 65S551G (65")
- 75S551G (75")
- 85S551G (85")
- 65QD7N (65")
- 75QD7N (75")
- 85QD7N (85")
- 100QD7N (100")
Check Price
43"
43S551G
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43"
50"
50S551G
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50"
55"
55S551G
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55"
65"
65S551G
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65"
65QD7N
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75"
75S551G
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75"
75QD7N
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85"
85S551G
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85"
85QD7N
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100"
100"
100QD7N
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Main Differences for
Mixed Usage
Mixed Usage
Threshold
Mixed Usage
5.9
5.7
HDR Brightness
4.5
5.5
Contrast
4.7
1.9
Black Uniformity
9.9
5.4
SDR Brightness
5.8
6.7
Full Comparison
Brightness
HDR Brightness
4.5
5.5
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
304 cd/m²
303 cd/m²
Yellow Skyscraper (~700 cd/m²)
217 cd/m²
309 cd/m²
Landscape Pool (~300 cd/m²)
159 cd/m²
215 cd/m²
Peak 2% Window
355 cd/m²
438 cd/m²
Peak 10% Window
355 cd/m²
440 cd/m²
Peak 25% Window
355 cd/m²
439 cd/m²
Peak 50% Window
355 cd/m²
439 cd/m²
Peak 100% Window
355 cd/m²
440 cd/m²
Sustained 2% Window
355 cd/m²
438 cd/m²
Sustained 10% Window
355 cd/m²
438 cd/m²
Sustained 25% Window
355 cd/m²
438 cd/m²
Sustained 50% Window
355 cd/m²
438 cd/m²
Sustained 100% Window
355 cd/m²
439 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.000
HDR Brightness In Game Mode
4.5
5.5
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
306 cd/m²
306 cd/m²
Yellow Skyscraper (~700 cd/m²)
217 cd/m²
309 cd/m²
Landscape Pool (~300 cd/m²)
161 cd/m²
216 cd/m²
Peak 2% Window
355 cd/m²
441 cd/m²
Peak 10% Window
356 cd/m²
441 cd/m²
Peak 25% Window
356 cd/m²
440 cd/m²
Peak 50% Window
356 cd/m²
440 cd/m²
Peak 100% Window
355 cd/m²
439 cd/m²
Sustained 2% Window
355 cd/m²
440 cd/m²
Sustained 10% Window
356 cd/m²
439 cd/m²
Sustained 25% Window
356 cd/m²
439 cd/m²
Sustained 50% Window
355 cd/m²
439 cd/m²
Sustained 100% Window
355 cd/m²
439 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.000
SDR Brightness
5.8
6.7
Real Scene Peak Brightness
310 cd/m²
386 cd/m²
Peak 2% Window
358 cd/m²
439 cd/m²
Peak 10% Window
353 cd/m²
439 cd/m²
Peak 25% Window
350 cd/m²
439 cd/m²
Peak 50% Window
347 cd/m²
439 cd/m²
Peak 100% Window
346 cd/m²
439 cd/m²
Sustained 2% Window
356 cd/m²
439 cd/m²
Sustained 10% Window
352 cd/m²
439 cd/m²
Sustained 25% Window
348 cd/m²
439 cd/m²
Sustained 50% Window
347 cd/m²
438 cd/m²
Sustained 100% Window
345 cd/m²
438 cd/m²
Automatic Brightness Limiting (ABL)
0.002
0.000
Black Level
Contrast
4.7
1.9
Contrast Picture
Contrast
5,083 : 1
1,419 : 1
Native Contrast
5,083 : 1
1,419 : 1
Lighting Zone Precision
0.0
0.0
Lighting Zone Precision Picture
Lighting Zone Transitions
10
10
Preferred LD Video, Moving Object
Local Dimming
No
No
Backlight
Direct
Direct
Dimming Zone Count Of The Tested TV
N/A
N/A
Contrast And Dark Details In Game Mode
5.0
2.5
Lighting Zone Precision Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
Black Uniformity
9.9
5.4
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
N/A
N/A
Native Black Uniformity Picture
Native Std. Dev.
0.284%
1.610%
Color
SDR Color Volume
6.7
7.5
DCI-P3 Gamut Rings
CIELAB DCI-P3 Coverage
83.72%
90.72%
BT.2020 Gamut Rings
CIELAB BT.2020 Coverage
56.80%
61.11%
HDR Color Volume
6.3
6.5
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
57.8%
61.3%
2020 Color Volume ITP Picture
10,000 cd/m² BT.2020 Coverage ITP
26.2%
27.6%
White Luminance
355 cd/m²
451 cd/m²
Red Luminance
75 cd/m²
94 cd/m²
Green Luminance
253 cd/m²
317 cd/m²
Blue Luminance
26 cd/m²
39 cd/m²
Cyan Luminance
279 cd/m²
351 cd/m²
Magenta Luminance
101 cd/m²
133 cd/m²
Yellow Luminance
327 cd/m²
412 cd/m²
SDR Pre-Calibration Color Accuracy
6.1
8.5
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE 2000
5.82
1.87
Color dE 2000
2.79
1.19
Gamma
2.15
2.17
Color Temperature
6,199 K
6,780 K
Picture Mode
Movie
Theater Night
Color Temp Setting
Warm -5
Warm 1
Gamma Setting
2.2
2.2
SDR Post-Calibration Color Accuracy
9.5
9.7
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE 2000
0.15
0.37
Color dE 2000
1.35
0.62
Gamma
2.20
2.18
Color Temperature
6,509 K
6,515 K
White Balance Calibration
20 point
20 point
Color Calibration
Yes
Yes
HDR Pre-Calibration Color Accuracy
7.1
6.4
HDR Pre White Balance Picture
HDR Pre Color Picture
White Balance dE ITP
9.70
12.25
Color dE ITP
8.9
12.4
Color Temperature
7,046 K
7,254 K
Picture Mode
Movie
Filmmaker
HDR Post-Calibration Color Accuracy
9.1
8.3
HDR Post White Balance Picture
HDR Post Color Picture
White Balance dE ITP
5.70
7.56
Color dE ITP
5.30
7.20
Color Temperature
6,540 K
6,612 K
Processing
PQ EOTF Tracking
7.5
5.3
PQ EOTF Graph
600 Nit Tracking Delta
0.0067
0.0154
1000 Nit Tracking Delta
0.0067
0.0154
4000 Nit Tracking Delta
0.0067
0.0154
Low-Quality Content Smoothing
6.0
7.9
Low-Quality Content Smoothing Picture
Smoothing
5.5
8.0
Detail Preservation
7.0
7.5
Upscaling: Sharpness Processing
5.5
7.5
Sharpness Picture - 480p
HDR Native Gradient
6.8
7.5
HDR Gradient Picture
100% Black To 50% Gray
6.0
6.0
50% Gray To 100% White
8.0
8.0
100% Black To 50% Red
6.0
8.0
50% Red To 100% Red
8.0
10
100% Black To 50% Green
4.0
6.0
50% Green To 100% Green
8.0
8.0
100% Black To 50% Blue
6.0
6.0
50% Blue To 100% Blue
8.0
8.0
Game Mode Responsiveness
Input Lag
8.2
8.7
1080p @ 60Hz
10.5 ms
13.4 ms
1080p @ 60Hz Outside Game Mode
161.7 ms
107.5 ms
1080p @ 120Hz
6.6 ms
4.9 ms
1080p @ Max Refresh Rate
6.6 ms
4.3 ms
4k @ 60Hz
10.5 ms
13.3 ms
4k @ 60Hz @ 4:4:4
10.5 ms
13.3 ms
4k @ 60Hz Outside Game Mode
160.9 ms
107.0 ms
4k @ 60Hz With Interpolation
160.8 ms
23.4 ms
4k @ 120Hz
N/A
4.9 ms
4k @ Max Refresh Rate
10.5 ms
4.4 ms
8k @ 60Hz
N/A
N/A
Supported Resolutions
7.2
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
120 Hz
240 Hz
4k @ 60Hz
Yes
Yes
4k @ 60Hz @ 4:4:4
Yes
Yes
4k @ 120Hz
No
Yes
4k @ 120Hz @ 4:4:4
No
Yes
4k Maximum Refresh Rate
60 Hz
144 Hz
8k @ 30Hz Or 24Hz
No
No
8k @ 60Hz
No
No
Variable Refresh Rate
6.4
8.5
Native Refresh Rate
60Hz
144Hz
Variable Refresh Rate
Yes
Yes
HDMI Forum VRR
Yes
Yes
FreeSync
Yes
Yes
G-SYNC Compatible
Yes
Yes
4k VRR Maximum
60 Hz
144 Hz
4k VRR Minimum
48 Hz
< 20 Hz
1080p VRR Maximum
120 Hz
144 Hz
1080p VRR Minimum
< 20 Hz
< 20 Hz
VRR + Local Dimming
No Local Dimming
No Local Dimming
CAD In Game Mode @ Max Refresh Rate
6.2
5.5
Pursuit Photo Max Refresh
CAD Heatmap Max Refresh
Transition At Max Refresh
0 to 31
0 to 31
Avg. CAD
282
277
Best 10% CAD
82
144
Worst 10% CAD
490
652
CAD In Game Mode @ 120Hz
0.0
5.4
Pursuit Photo 120Hz
CAD Heatmap 120Hz
Transition At 120Hz
0 to 31
Avg. CAD
N/A
296
Best 10% CAD
N/A
162
Worst 10% CAD
N/A
632
CAD In Game Mode @ 60Hz
6.2
3.2
Pursuit Photo 60Hz
CAD Heatmap 60Hz
Transition 60Hz
0 to 31
0 to 31
Avg. CAD
282
455
Best 10% CAD
82
245
Worst 10% CAD
490
762
PS5 Compatibility
PS5 Screenshot
Auto Low Latency Mode (ALLM)
Yes
Yes
4k @ 120Hz
No
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
No
Yes
1440p @ 120Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
HDR
Yes
Yes
VRR
Yes
Yes
Motion Handling
Stutter
7.3
7.3
Frame Hold Time @ 24 fps
31.3 ms
31.3 ms
Frame Hold Time @ 60 fps
6.3 ms
6.3 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
7.1
7.0
Pursuit Photo 60Hz
Response Time Heatmap 60Hz
Transition At 60Hz
0 to 31
0 to 31
First Response Time
10.4 ms
10.4 ms
Total Response Time
11.9 ms
10.4 ms
Worst 10% Response Time
21.2 ms
25.6 ms
Flicker
Backlight chart
Flicker-Free
No
No
PWM Dimming Frequency
150 Hz
240 Hz
Black Frame Insertion (BFI)
BFI Picture
BFI Frequency Picture
Optional BFI
No
No
Min Flicker For 60 fps
150 Hz
240 Hz
60Hz For 60 fps
No
No
120Hz For 120 fps
No
No
Min Flicker For 60 fps In Game Mode
150 Hz
240 Hz
Motion Interpolation
Motion Interpolation (30 fps) Picture
Motion Interpolation (30 fps)
Yes
Yes
Motion Interpolation (60 fps) Picture
Motion Interpolation (60 fps)
No
Yes
Reflections
Direct Reflections
6.3
5.6
Ring Light Picture
Direct Reflections Graph
Peak Direct Reflection Intensity
46.9%
61.3%
Screen Finish
Glossy
Glossy
Ambient Black Level Raise
9.1
8.8
Black Level Raise Picture
Bright Room Black Level Raise Graph
Black Luminance @ 0 lx
0.06 cd/m²
0.34 cd/m²
Black Luminance @ 1000 lx
0.38 cd/m²
0.53 cd/m²
Total Reflected Light
6.2
7.6
Bright Room Off Picture
Ring Picture Total Reflection
Total Reflected Light Intensity
24,823% ⋅ pixel
19,873% ⋅ pixel
Diffraction Artifacts
Yes
No
Ambient Color Saturation
6.6
6.9
Bright Room Color Volume Graph
Low-Luminance Colors @ 1000 lx
56.56%
57.56%
Mid-Luminance Colors @ 1000 lx
57.25%
62.36%
High-Luminance Colors @ 1000 lx
46.24%
53.93%
Panel
Viewing Angle
6.6
7.6
Viewing Angle Video
Chroma Graph
Color Washout
33°
31°
Hue Graph
Color Shift
54°
50°
Lightness Graph
Brightness Loss
39°
32°
Black Level Raise
18°
70°
Gamma Shift
16°
40°
Gray Uniformity
6.0
5.9
50% Uniformity Picture
50% Std. Dev.
4.153%
5.341%
50% DSE
0.221%
0.191%
5% Uniformity Picture
5% Std. Dev.
0.732%
0.666%
5% DSE
0.079%
0.085%
Panel Technology
Spectral Power Distribution
Pixels Picture
Type
LED
LED
Sub-Type
VA
IPS
Subpixel Layout
BGR
RGB
Inputs
Input Specifications
Side Inputs Picture
Rear Inputs Picture
HDMI
3 (3x HDMI 2.0)
4 (2x HDMI 2.0, 2x HDMI 2.1)
HDMI 2.1 Rated Speed
No HDMI 2.1
48 Gbps
ATSC Tuner
1.0
1.0
USB Ports
1
2
USB 3.0
No
Yes (1)
Audio Out 3.5mm
1
1
Wi-Fi
Yes (2.4 GHz, 5 GHz)
Yes (2.4 GHz, 5 GHz)
Ethernet Speed
100 Mbps
100 Mbps
Composite In
1 (Adapter Required, Not Incl.)
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+
Yes
Yes
Dolby Vision
Yes
Yes
HLG
Yes
Yes
Design
Style
Design Picture
Curved
No
No
Stand
Stand Picture
Back
Back Picture
Wall Mount
VESA 400x400
VESA 300x400
Borders
Borders Picture
Borders
0.33" (0.9 cm)
0.39" (1.0 cm)
Thickness
Thickness Picture
Max Thickness
2.60" (6.6 cm)
2.99" (7.6 cm)
Build Quality
7.0
6.5
Build quality picture
Smart Features
Interface
Smart TV Picture
Smart OS
Google TV
Google TV
Version
12
12
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
Remote
Remote Picture
Voice Control
Yes
Yes
TV Controls
Controls Picture
Mute Switch
No
No
In The Box
In The Box Picture
Misc
Power Consumption
54 W
54 W
Power Consumption (Max)
188 W
176 W
Firmware
V8-R75PT01-LF1V174
V0039.0100K.O0823
Sound Quality
Frequency Response
6.3
6.0
Frequency Response
Low-Frequency Extension
134.54 Hz
119.87 Hz
Std. Dev. @ 70
3.96 dB
3.92 dB
Std. Dev. @ 80
4.01 dB
3.87 dB
Std. Dev. @ Max
4.52 dB
6.09 dB
Max
87.2 dB SPL
86.0 dB SPL
Dynamic Range Compression
2.53 dB
4.31 dB
Digital Room Correction
No
Yes
Check Price
43"
43S551G
SEE PRICE
BestBuy.com
43"
50"
50S551G
SEE PRICE
BestBuy.com
50"
55"
55S551G
SEE PRICE
BestBuy.com
55"
65"
65S551G
SEE PRICE
BestBuy.com
65"
65QD7N
SEE PRICE
Amazon.com
75"
75S551G
SEE PRICE
BestBuy.com
75"
75QD7N
SEE PRICE
Amazon.com
85"
85S551G
SEE PRICE
Amazon.com
85"
85QD7N
SEE PRICE
BestBuy.com
100"
100"
100QD7N
SEE PRICE
BestBuy.com
TCL S551G
Hisense QD7N
Comments
TCL S551G vs Hisense QD7N: Main Discussion
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