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Notice: TV 2.1 is here! This update is the first of three that focus on the different aspects related to a TV's motion handling when watching low frame rate content. You can read about the specific changes made in our 2.1 changelog. You can also learn more about our entire plan to To Solve The Motion Mystery On TVs.
Products
Hisense U6N
TCL S551G
Tested using Methodology v2.0.1
Updated Sep 08, 2025 07:55 PM
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Amazon.comTested using Methodology v2.0.1
Updated Sep 24, 2025 08:56 PM
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Amazon.com
Resolution4k
Native Refresh Rate60Hz
TypeLED
Sub-TypeVA
Dolby VisionYes
Screen FinishGlossy
Resolution4k
Native Refresh Rate60Hz
TypeLED
Sub-TypeVA
Dolby VisionYes
Screen FinishGlossy
Our Verdict
Hisense U6N
TCL S551G
The Hisense U6N and the TCL S551G are both entry-level TVs, but the Hisense is better overall thanks to its local dimming feature and significantly better contrast. That, combined with its higher peak brightness, provides much better picture quality and a more impactful HDR experience. That said, it has a worse viewing angle, so it's even less suitable for wide seating arrangements.
Variants
- 55U6N (55")
- 65U6N (65")
- 75U6N (75")
- 85U6N (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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55U6N
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55S551G
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65U6N
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65S551G
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Finding store75"
75U6N
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75S551G
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85U6N
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85S551G
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Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
6.8
5.9
HDR Brightness
5.8
4.5
Lighting Zone Precision
7.0
0.0
Contrast
7.0
4.7
SDR Brightness
7.1
5.8
Full Comparison
Brightness
HDR Brightness
5.8
4.5
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
319 cd/m²
304 cd/m²
Yellow Skyscraper (~700 cd/m²)
290 cd/m²
217 cd/m²
Landscape Pool (~300 cd/m²)
253 cd/m²
159 cd/m²
Peak 2% Window
340 cd/m²
355 cd/m²
Peak 10% Window
534 cd/m²
355 cd/m²
Peak 25% Window
629 cd/m²
355 cd/m²
Peak 50% Window
565 cd/m²
355 cd/m²
Peak 100% Window
442 cd/m²
355 cd/m²
Sustained 2% Window
338 cd/m²
355 cd/m²
Sustained 10% Window
527 cd/m²
355 cd/m²
Sustained 25% Window
621 cd/m²
355 cd/m²
Sustained 50% Window
563 cd/m²
355 cd/m²
Sustained 100% Window
441 cd/m²
355 cd/m²
Automatic Brightness Limiting (ABL)
0.034
0.000
HDR Brightness In Game Mode
5.8
4.5
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
315 cd/m²
306 cd/m²
Yellow Skyscraper (~700 cd/m²)
290 cd/m²
217 cd/m²
Landscape Pool (~300 cd/m²)
260 cd/m²
161 cd/m²
Peak 2% Window
337 cd/m²
355 cd/m²
Peak 10% Window
541 cd/m²
356 cd/m²
Peak 25% Window
641 cd/m²
356 cd/m²
Peak 50% Window
572 cd/m²
356 cd/m²
Peak 100% Window
450 cd/m²
355 cd/m²
Sustained 2% Window
335 cd/m²
355 cd/m²
Sustained 10% Window
534 cd/m²
356 cd/m²
Sustained 25% Window
633 cd/m²
356 cd/m²
Sustained 50% Window
570 cd/m²
355 cd/m²
Sustained 100% Window
450 cd/m²
355 cd/m²
Automatic Brightness Limiting (ABL)
0.035
0.000
SDR Brightness
7.1
5.8
Real Scene Peak Brightness
422 cd/m²
310 cd/m²
Peak 2% Window
328 cd/m²
358 cd/m²
Peak 10% Window
519 cd/m²
353 cd/m²
Peak 25% Window
612 cd/m²
350 cd/m²
Peak 50% Window
551 cd/m²
347 cd/m²
Peak 100% Window
430 cd/m²
346 cd/m²
Sustained 2% Window
325 cd/m²
356 cd/m²
Sustained 10% Window
511 cd/m²
352 cd/m²
Sustained 25% Window
604 cd/m²
348 cd/m²
Sustained 50% Window
548 cd/m²
347 cd/m²
Sustained 100% Window
429 cd/m²
345 cd/m²
Automatic Brightness Limiting (ABL)
0.035
0.002
Black Level
Contrast
7.0
4.7
Contrast Picture
Contrast
50,362 : 1
5,083 : 1
Native Contrast
6,616 : 1
5,083 : 1
Lighting Zone Precision
7.0
0.0
Lighting Zone Precision Picture
Lighting Zone Transitions
7.0
10
Preferred LD Video, Moving Object
Local Dimming
Yes
No
Backlight
Full-Array
Direct
Dimming Zone Count Of The Tested TV
240
N/A
Contrast And Dark Details In Game Mode
7.0
5.0
Lighting Zone Precision Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
Black Uniformity
9.5
9.9
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
0.406%
N/A
Native Black Uniformity Picture
Native Std. Dev.
0.311%
0.284%
Color
SDR Color Volume
7.2
6.7
DCI-P3 Gamut Rings
CIELAB DCI-P3 Coverage
87.75%
83.72%
BT.2020 Gamut Rings
CIELAB BT.2020 Coverage
61.73%
56.80%
HDR Color Volume
6.6
6.3
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
60.4%
57.8%
2020 Color Volume ITP Picture
10,000 cd/m² BT.2020 Coverage ITP
27.9%
26.2%
White Luminance
340 cd/m²
355 cd/m²
Red Luminance
69 cd/m²
75 cd/m²
Green Luminance
250 cd/m²
253 cd/m²
Blue Luminance
27 cd/m²
26 cd/m²
Cyan Luminance
272 cd/m²
279 cd/m²
Magenta Luminance
90 cd/m²
101 cd/m²
Yellow Luminance
317 cd/m²
327 cd/m²
SDR Pre-Calibration Color Accuracy
6.0
6.1
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE 2000
6.44
5.82
Color dE 2000
3.56
2.79
Gamma
2.23
2.15
Color Temperature
6,493 K
6,199 K
Picture Mode
Theater
Movie
Color Temp Setting
Warm 1
Warm -5
Gamma Setting
2.2
2.2
SDR Post-Calibration Color Accuracy
9.7
9.5
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE 2000
0.20
0.15
Color dE 2000
0.73
1.35
Gamma
2.21
2.20
Color Temperature
6,531 K
6,509 K
White Balance Calibration
20 point
20 point
Color Calibration
Yes
Yes
HDR Pre-Calibration Color Accuracy
6.9
7.1
HDR Pre White Balance Picture
HDR Pre Color Picture
White Balance dE ITP
8.45
9.70
Color dE ITP
12.7
8.9
Color Temperature
7,078 K
7,046 K
Picture Mode
Filmmaker
Movie
HDR Post-Calibration Color Accuracy
8.5
9.1
HDR Post White Balance Picture
HDR Post Color Picture
White Balance dE ITP
4.97
5.70
Color dE ITP
10.10
5.30
Color Temperature
6,438 K
6,540 K
Processing
PQ EOTF Tracking
4.8
7.5
PQ EOTF Graph
600 Nit Tracking Delta
0.0189
0.0067
1000 Nit Tracking Delta
0.0188
0.0067
4000 Nit Tracking Delta
0.0281
0.0067
Low-Quality Content Smoothing
4.8
6.0
Low-Quality Content Smoothing Picture
Smoothing
3.0
5.5
Detail Preservation
9.0
7.0
Upscaling: Sharpness Processing
7.5
5.5
Sharpness Picture - 480p
HDR Native Gradient
7.3
6.8
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
8.0
6.0
50% Red To 100% Red
8.0
8.0
100% Black To 50% Green
6.0
4.0
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
8.1
8.2
1080p @ 60Hz
10.8 ms
10.5 ms
1080p @ 60Hz Outside Game Mode
115.1 ms
161.7 ms
1080p @ 120Hz
6.5 ms
6.6 ms
1080p @ Max Refresh Rate
6.5 ms
6.6 ms
4k @ 60Hz
10.8 ms
10.5 ms
4k @ 60Hz @ 4:4:4
10.8 ms
10.5 ms
4k @ 60Hz Outside Game Mode
90.7 ms
160.9 ms
4k @ 60Hz With Interpolation
114.6 ms
160.8 ms
4k @ 120Hz
N/A
N/A
4k @ Max Refresh Rate
10.8 ms
10.5 ms
8k @ 60Hz
N/A
N/A
Supported Resolutions
7.2
7.2
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 Maximum Refresh Rate
120 Hz
120 Hz
4k @ 60Hz
Yes
Yes
4k @ 60Hz @ 4:4:4
Yes
Yes
4k @ 120Hz
No
No
4k @ 120Hz @ 4:4:4
No
No
4k Maximum Refresh Rate
60 Hz
60 Hz
8k @ 30Hz Or 24Hz
No
No
8k @ 60Hz
No
No
Variable Refresh Rate
6.0
6.4
Native Refresh Rate
60Hz
60Hz
Variable Refresh Rate
Yes
Yes
HDMI Forum VRR
Yes
Yes
FreeSync
Yes
Yes
G-SYNC Compatible
Yes
Yes
4k VRR Maximum
60 Hz
60 Hz
4k VRR Minimum
48 Hz
48 Hz
1080p VRR Maximum
60 Hz
120 Hz
1080p VRR Minimum
48 Hz
< 20 Hz
VRR + Local Dimming
Yes
No Local Dimming
CAD In Game Mode @ Max Refresh Rate
6.2
6.2
Pursuit Photo Max Refresh
CAD Heatmap Max Refresh
Transition At Max Refresh
0 to 31
0 to 31
Avg. CAD
275
282
Best 10% CAD
116
82
Worst 10% CAD
425
490
CAD In Game Mode @ 120Hz
0.0
0.0
Pursuit Photo 120Hz
CAD Heatmap 120Hz
Transition At 120Hz
Avg. CAD
N/A
N/A
Best 10% CAD
N/A
N/A
Worst 10% CAD
N/A
N/A
CAD In Game Mode @ 60Hz
6.2
6.2
Pursuit Photo 60Hz
CAD Heatmap 60Hz
Transition 60Hz
0 to 31
0 to 31
Avg. CAD
275
282
Best 10% CAD
116
82
Worst 10% CAD
425
490
PS5 Compatibility
PS5 Screenshot
Auto Low Latency Mode (ALLM)
Yes
Yes
4k @ 120Hz
No
No
1440p @ 120Hz
No
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
No
1440p @ 120Hz
No
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
6.4 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
6.9
7.1
Pursuit Photo 60Hz
Response Time Heatmap 60Hz
Transition At 60Hz
0 to 31
0 to 31
First Response Time
10.3 ms
10.4 ms
Total Response Time
13.1 ms
11.9 ms
Worst 10% Response Time
21.7 ms
21.2 ms
Flicker
Backlight chart
Flicker-Free
No
No
PWM Dimming Frequency
7,800 Hz
150 Hz
Black Frame Insertion (BFI)
BFI Picture
BFI Frequency Picture
Optional BFI
No
No
Min Flicker For 60 fps
N/A
150 Hz
60Hz For 60 fps
No
No
120Hz For 120 fps
No
No
Min Flicker For 60 fps In Game Mode
N/A
150 Hz
Motion Interpolation
Motion Interpolation (30 fps) Picture
Motion Interpolation (30 fps)
Yes
Yes
Motion Interpolation (60 fps) Picture
Motion Interpolation (60 fps)
No
No
Reflections
Direct Reflections
6.0
6.3
Ring Light Picture
Direct Reflections Graph
Peak Direct Reflection Intensity
54.5%
46.9%
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
0.06 cd/m²
Black Luminance @ 1000 lx
0.26 cd/m²
0.38 cd/m²
Total Reflected Light
7.2
6.2
Bright Room Off Picture
Ring Picture Total Reflection
Total Reflected Light Intensity
22,170% ⋅ pixel
24,823% ⋅ pixel
Diffraction Artifacts
No
Yes
Ambient Color Saturation
7.5
6.6
Bright Room Color Volume Graph
Low-Luminance Colors @ 1000 lx
64.68%
56.56%
Mid-Luminance Colors @ 1000 lx
62.90%
57.25%
High-Luminance Colors @ 1000 lx
54.40%
46.24%
Panel
Viewing Angle
6.0
6.6
Viewing Angle Video
Chroma Graph
Color Washout
22°
33°
Hue Graph
Color Shift
21°
54°
Lightness Graph
Brightness Loss
30°
39°
Black Level Raise
19°
18°
Gamma Shift
16°
16°
Gray Uniformity
6.2
6.0
50% Uniformity Picture
50% Std. Dev.
4.126%
4.153%
50% DSE
0.180%
0.221%
5% Uniformity Picture
5% Std. Dev.
0.830%
0.732%
5% DSE
0.105%
0.079%
Panel Technology
Spectral Power Distribution
Pixels Picture
Type
LED
LED
Sub-Type
VA
VA
Subpixel Layout
BGR
BGR
Inputs
Input Specifications
Side Inputs Picture
Rear Inputs Picture
HDMI
4 (4x HDMI 2.0)
3 (3x HDMI 2.0)
HDMI 2.1 Rated Speed
No HDMI 2.1
No HDMI 2.1
ATSC Tuner
1.0
1.0
USB Ports
2
1
USB 3.0
No
No
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 400x300
VESA 400x400
Borders
Borders Picture
Borders
0.39" (1.0 cm)
0.33" (0.9 cm)
Thickness
Thickness Picture
Max Thickness
2.99" (7.6 cm)
2.60" (6.6 cm)
Build Quality
6.5
7.0
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
Yes
No
In The Box
In The Box Picture
Misc
Power Consumption
58 W
54 W
Power Consumption (Max)
184 W
188 W
Firmware
V0000.01.00A.O0403
V8-R75PT01-LF1V174
Sound Quality
Frequency Response
5.7
6.3
Frequency Response
Low-Frequency Extension
126.99 Hz
134.54 Hz
Std. Dev. @ 70
4.38 dB
3.96 dB
Std. Dev. @ 80
4.57 dB
4.01 dB
Std. Dev. @ Max
6.69 dB
4.52 dB
Max
85.7 dB SPL
87.2 dB SPL
Dynamic Range Compression
3.66 dB
2.53 dB
Digital Room Correction
No
No
Check Price
43"
43"
43S551G
Searching
Finding store50"
50"
50S551G
Searching
Finding store55"
55U6N
Searching
Finding store55"
55S551G
Searching
Finding store65"
65U6N
Searching
Finding store65"
65S551G
Searching
Finding store75"
75U6N
Searching
Finding store75"
75S551G
Searching
Finding store85"
85U6N
Searching
Finding store85"
85S551G
Searching
Finding store
Hisense U6N
TCL S551G
Comments
Hisense U6N vs TCL S551G: Main Discussion
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