Products
TCL S4/S450G
TCL S551G
Tested using Methodology v1.11
Updated Jan 21, 2026 07:29 PM
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Amazon.com
Tested using Methodology v2.2
Updated Mar 16, 2026 02:10 PM
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BestBuy.com
Resolution4k
Native Refresh Rate
Panel TypeLED
Sub-Type
VA
Dolby Vision
Screen Finish
Resolution4k
Native Refresh Rate
60Hz
Panel TypeLCD
Sub-Type
VA
Dolby Vision
Yes
Screen Finish
Glossy
Our Verdict
TCL S4/S450G
TCL S551G
The TCL S551G is better than the TCL S4/S450G. While both have a somewhat limited contrast ratio and no local dimming, the S5 gets noticeably brighter, resulting in better overall picture quality, especially in brighter rooms. It also has a better viewing angle and wider color gamut, as well as offering more gaming features, like VRR and 1080p or 1440p @ 120Hz.
Variants
- 43S450G (43")
- 50S450G (50")
- 43S551G (43")
- 50S551G (50")
Check Price
43"
43S450G
SEE PRICE
Amazon.com
43"
43S551G
SEE PRICE
Walmart.com
50"
50S450G
SEE PRICE
Amazon.com
50"
50S551G
SEE PRICE
Walmart.com
55"
55S450G
SEE PRICE
Amazon.com
55"
55S551G
SEE PRICE
BestBuy.com
65"
65S450G
SEE PRICE
Amazon.com
65"
65S551G
SEE PRICE
BestBuy.com
75"
75S450G
SEE PRICE
Amazon.com
75"
75S551G
SEE PRICE
BestBuy.com
85"
85S450G
SEE PRICE
Amazon.com
85"
85S551G
SEE PRICE
Amazon.com
Main Differences for
Mixed Usage
Mixed Usage
Threshold
Major Test Bench Update: Two or more of the products being compared have been tested with different TV test methodologies after a major update. Some of the test results aren't directly comparable, and are hidden. Learn more
Mixed Usage
Full Comparison
Brightness
HDR Brightness
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
Yellow Skyscraper (~700 cd/m²)
Landscape Pool (~300 cd/m²)
Peak 2% Window
Peak 10% Window
Peak 25% Window
Peak 50% Window
Peak 100% Window
Sustained 2% Window
Sustained 10% Window
Sustained 25% Window
Sustained 50% Window
Sustained 100% Window
Automatic Brightness Limiting (ABL)
HDR Brightness In Game Mode
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
Yellow Skyscraper (~700 cd/m²)
Landscape Pool (~300 cd/m²)
Peak 2% Window
Peak 10% Window
Peak 25% Window
Peak 50% Window
Peak 100% Window
Sustained 2% Window
Sustained 10% Window
Sustained 25% Window
Sustained 50% Window
Sustained 100% Window
Automatic Brightness Limiting (ABL)
SDR Brightness
Real Scene Peak Brightness
Peak 2% Window
Peak 10% Window
Peak 25% Window
Peak 50% Window
Peak 100% Window
Sustained 2% Window
Sustained 10% Window
Sustained 25% Window
Sustained 50% Window
Sustained 100% Window
Automatic Brightness Limiting (ABL)
Picture Quality
Contrast
Contrast Picture
Contrast
Native Contrast
Blooming
Blooming Photo
Lighting Zone Transitions
Preferred LD Video, Moving Object
Local Dimming
Backlight
Dimming Zones Count Of Tested TV
Contrast And Dark Details In Game Mode
Blooming Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
HDR Brightness
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
Yellow Skyscraper (~700 cd/m²)
Landscape Pool (~300 cd/m²)
Peak 2% Window
Peak 10% Window
Peak 25% Window
Peak 50% Window
Peak 100% Window
Sustained 2% Window
Sustained 10% Window
Sustained 25% Window
Sustained 50% Window
Sustained 100% Window
Automatic Brightness Limiting (ABL)
HDR Brightness In Game Mode
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
Yellow Skyscraper (~700 cd/m²)
Landscape Pool (~300 cd/m²)
Peak 2% Window
Peak 10% Window
Peak 25% Window
Peak 50% Window
Peak 100% Window
Sustained 2% Window
Sustained 10% Window
Sustained 25% Window
Sustained 50% Window
Sustained 100% Window
Automatic Brightness Limiting (ABL)
PQ EOTF Tracking
PQ EOTF Graph
600 Nit Tracking Delta
1000 Nit Tracking Delta
4000 Nit Tracking Delta
SDR Brightness
Real Scene Peak Brightness
Peak 2% Window
Peak 10% Window
Peak 25% Window
Peak 50% Window
Peak 100% Window
Sustained 2% Window
Sustained 10% Window
Sustained 25% Window
Sustained 50% Window
Sustained 100% Window
Automatic Brightness Limiting (ABL)
Color Gamut
Wide Color Gamut
Color Gamut DCI-P3 Picture
DCI P3 xy
DCI P3 uv
Color Gamut Rec.2020 Picture
Rec 2020 xy
Rec 2020 uv
Color Volume
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
2020 Color Volume ITP Picture
10,000 cd/m² Rec 2020 Coverage ITP
White Luminance
Red Luminance
Green Luminance
Blue Luminance
Cyan Luminance
Magenta Luminance
Yellow Luminance
Pre Calibration
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE
Color dE
Gamma
Color Temperature
Picture Mode
Color Temp Setting
Gamma Setting
Post Calibration
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE
Color dE
Gamma
Color Temperature
White Balance Calibration
Color Calibration
Gray Uniformity
50% Uniformity Picture
50% Std. Dev.
50% DSE
5% Uniformity Picture
5% Std. Dev.
5% DSE
Black Uniformity
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
Native Black Uniformity Picture
Native Std. Dev.
Viewing Angle
Viewing Angle Video
Chroma Graph
Color Washout
Hue Graph
Color Shift
Lightness Graph
Brightness Loss
Black Level Raise
Gamma Shift
Reflections
Reflections Picture
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Total Reflections
Indirect Reflections
Calculated Direct Reflections
HDR Native Gradient
HDR Gradient Picture
100% Black to 50% Gray
50% Gray to 100% White
100% Black to 50% Red
50% Red to 100% Red
100% Black to 50% Green
50% Green to 100% Green
100% Black to 50% Blue
50% Blue to 100% Blue
Low-Quality Content Smoothing
Low-Quality Content Smoothing Picture
Smoothing
Detail Preservation
Upscaling: Sharpness Processing
Sharpness Picture - 480p
Pixels
Pixels Picture
Subpixel Layout
Type
Sub-Type
Black Level
Contrast
Contrast Picture
Contrast
Native Contrast
Lighting Zone Precision
Lighting Zone Precision Picture
Lighting Zone Transitions
Preferred LD Video, Moving Object
Local Dimming
Backlight
Dimming Zone Count Of The Tested TV
Contrast And Dark Details In Game Mode
Lighting Zone Precision Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
Black Uniformity
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
Native Black Uniformity Picture
Native Std. Dev.
Motion
Response Time
Motion Blur Picture
Response Time Chart
80% Response Time
100% Response Time
Flicker-Free
Backlight chart
Flicker-Free
PWM Dimming Frequency
Black Frame Insertion (BFI)
BFI Picture
BFI Frequency Picture
Optional BFI
Min Flicker For 60 fps
60Hz For 60 fps
120Hz For 120 fps
Min Flicker for 60 fps in Game Mode
Motion Interpolation
Motion Interpolation (30 fps) Picture
Motion Interpolation (30 fps)
Motion Interpolation (60 fps) Picture
Motion Interpolation (60 fps)
Stutter
Frame Hold Time @ 24 fps
Frame Hold Time @ 60 fps
24p Judder
Judder-Free 24p
Judder-Free 24p via 60p
Judder-Free 24p via 60i
Judder-Free 24p via Native Apps
Variable Refresh Rate
Native Refresh Rate
Variable Refresh Rate
HDMI Forum VRR
FreeSync
G-SYNC Compatible
4k VRR Maximum
4k VRR Minimum
1080p VRR Maximum
1080p VRR Minimum
1440p VRR Maximum
1440p VRR Minimum
VRR + Local Dimming
Color
SDR Color Volume
DCI-P3 Gamut Rings
CIELAB DCI-P3 Coverage
BT.2020 Gamut Rings
CIELAB BT.2020 Coverage
HDR Color Volume
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
2020 Color Volume ITP Picture
10,000 cd/m² BT.2020 Coverage ITP
White Luminance
Red Luminance
Green Luminance
Blue Luminance
Cyan Luminance
Magenta Luminance
Yellow Luminance
SDR Pre-Calibration Color Accuracy
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE 2000
Color dE 2000
Gamma
Color Temperature
Picture Mode
Color Temp Setting
Gamma Setting
SDR Post-Calibration Color Accuracy
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE 2000
Color dE 2000
Gamma
Color Temperature
White Balance Calibration
Color Calibration
HDR Pre-Calibration Color Accuracy
HDR Pre White Balance Picture
HDR Pre Color Picture
White Balance dE ITP
Color dE ITP
Color Temperature
Picture Mode
HDR Post-Calibration Color Accuracy
HDR Post White Balance Picture
HDR Post Color Picture
White Balance dE ITP
Color dE ITP
Color Temperature
Processing
PQ EOTF Tracking
PQ EOTF Graph
600 Nit Tracking Delta
1000 Nit Tracking Delta
4000 Nit Tracking Delta
Low-Quality Content Smoothing
Low-Quality Content Smoothing Picture
Smoothing
Detail Preservation
Upscaling: Sharpness Processing
Sharpness Picture - 480p
HDR Native Gradient
HDR Gradient Picture
100% Black To 50% Gray
50% Gray To 100% White
100% Black To 50% Red
50% Red To 100% Red
100% Black To 50% Green
50% Green To 100% Green
100% Black To 50% Blue
50% Blue To 100% Blue
Game Mode Responsiveness
Input Lag
1080p @ 60Hz
1080p @ 60Hz Outside Game Mode
1080p @ 120Hz
1080p @ Max Refresh Rate
4k @ 60Hz
4k @ 60Hz @ 4:4:4
4k @ 60Hz Outside Game Mode
4k @ 60Hz With Interpolation
4k @ 120Hz
4k @ Max Refresh Rate
8k @ 60Hz
Supported Resolutions
Resolution
480p @ 59.94Hz (Widescreen)
720p @ 59.94Hz
1080p @ 60Hz @ 4:4:4
1080p @ 120Hz
1080p Maximum Refresh Rate
4k @ 60Hz
4k @ 60Hz @ 4:4:4
4k @ 120Hz
4k @ 120Hz @ 4:4:4
4k Maximum Refresh Rate
8k @ 30Hz Or 24Hz
8k @ 60Hz
Variable Refresh Rate
Native Refresh Rate
Variable Refresh Rate
HDMI Forum VRR
FreeSync
G-SYNC Compatible
4k VRR Maximum
4k VRR Minimum
1080p VRR Maximum
1080p VRR Minimum
VRR + Local Dimming
CAD In Game Mode @ Max Refresh Rate
Pursuit Photo Max Refresh
CAD Heatmap Max Refresh
Transition At Max Refresh
Avg. CAD
Best 10% CAD
Worst 10% CAD
CAD In Game Mode @ 120Hz
Pursuit Photo 120Hz
CAD Heatmap 120Hz
Transition At 120Hz
Avg. CAD
Best 10% CAD
Worst 10% CAD
CAD In Game Mode @ 60Hz
Pursuit Photo 60Hz
CAD Heatmap 60Hz
Transition 60Hz
Avg. CAD
Best 10% CAD
Worst 10% CAD
PS5 Compatibility
PS5 Screenshot
Auto Low Latency Mode (ALLM)
4k @ 120Hz
1440p @ 120Hz
1080p @ 120Hz
HDR
VRR
Xbox Series X|S Compatibility
Xbox Series X Screenshot
Auto Low Latency Mode (ALLM)
4k @ 120Hz
1440p @ 120Hz
1080p @ 120Hz
HDR
VRR
Motion Handling
Stutter
Stutter Video
Stutter Image
Stutter Graph
Sample And Hold
Frame Hold Time @ 24 fps
Stutter Reduction Via Interpolation
Stutter Reduction Via Interpolation Video
Stutter Reduction Via Interpolation Image
Stutter Reduction Via Interpolation Graph
Sample And Hold (Interpolation)
Interpolation Consistency
Judder
Judder Video Picture
Judder 24p
Judder 25p
Judder 24p via 60p
Judder 25p via 60p
Judder 24p via 60i
Judder 24p via Native Apps
Judder 25p via Native Apps
Micro Judder
24p Clip
25p Clip
Micro Judder-Free 24p
Micro Judder-Free 25p
Micro Judder-Free 24p via 60p
Micro Judder-Free 25p via 60p
Micro Judder-Free 24p via Native Apps
Micro Judder-Free 25p via Native Apps
Response Time
Pursuit Photo 60Hz
Response Time Heatmap 60Hz
Transition At 60Hz
First Response Time
Total Response Time
Worst 10% Response Time
Transition Artifacts
Color Transition Image
Edge Transition Image
Color Artifacts
Edge Artifacts
Flicker
Backlight chart
Flicker-Free
PWM Dimming Frequency
Black Frame Insertion (BFI)
BFI Picture
BFI Frequency Picture
Optional BFI
Min Flicker For 60 fps
60Hz For 60 fps
120Hz For 120 fps
Min Flicker For 60 fps In Game Mode
Reflections
Direct Reflections
Ring Light Picture
Direct Reflections Graph
Peak Direct Reflection Intensity
Screen Finish
Ambient Black Level Raise
Black Level Raise Picture
Bright Room Black Level Raise Graph
Black Luminance @ 0 lx
Black Luminance @ 1000 lx
Total Reflected Light
Bright Room Off Picture
Ring Picture Total Reflection
Total Reflected Light Intensity
Diffraction Artifacts
Ambient Color Saturation
Bright Room Color Volume Graph
Low-Luminance Colors @ 1000 lx
Mid-Luminance Colors @ 1000 lx
High-Luminance Colors @ 1000 lx
Panel
Viewing Angle
Viewing Angle Video
Chroma Graph
Color Washout
Hue Graph
Color Shift
Lightness Graph
Brightness Loss
Black Level Raise
Gamma Shift
Gray Uniformity
50% Uniformity Picture
50% Std. Dev.
50% DSE
5% Uniformity Picture
5% Std. Dev.
5% DSE
Panel Technology
Spectral Power Distribution
Pixels Picture
Panel Type
Sub-Type
Subpixel Layout
Inputs
Input Lag
1080p @ 60Hz
1080p @ 60Hz Outside Game Mode
1080p @ 120Hz
1080p @ 144Hz
1440p @ 60Hz
1440p @ 120Hz
1440p @ 144Hz
4k @ 60Hz
4k @ 60Hz + 10-Bit HDR
4k @ 60Hz @ 4:4:4
4k @ 60Hz Outside Game Mode
4k @ 60Hz With Interpolation
4k @ 120Hz
4k @ 144Hz
8k @ 60Hz
Supported Resolutions
Resolution
480p @ 59.94Hz (Widescreen)
720p @ 59.94Hz
1080p @ 60Hz @ 4:4:4
1080p @ 120Hz
1080p @ 144Hz
1440p @ 60Hz
1440p @ 120Hz
1440p @ 144Hz
4k @ 60Hz
4k @ 60Hz @ 4:4:4
4k @ 120Hz
4k @ 120Hz @ 4:4:4
4k @ 144Hz
8k @ 30Hz or 24Hz
8k @ 60Hz
PS5 Compatibility
PS5 Screenshot
Auto Low Latency Mode (ALLM)
4k @ 120Hz
1440p @ 120Hz
1080p @ 120Hz
HDR
VRR
Xbox Series X|S Compatibility
Xbox Series X Screenshot
Auto Low Latency Mode (ALLM)
4k @ 120Hz
1440p @ 120Hz
1080p @ 120Hz
HDR
VRR
Input Specifications
Side Inputs Picture
Rear Inputs Picture
HDR10
HDMI
HDR10+
Dolby Vision
HDMI 2.1 Rated Speed
HLG
ATSC Tuner
USB Ports
HDMI 2.0 Full Bandwidth
USB 3.0
Audio Out 3.5mm
Wi-Fi
Ethernet Speed
CEC
Composite In
HDCP 2.2
Digital Optical Audio Out
Variable Analog Audio Out
Input Photos
Side Inputs Picture
Rear Inputs Picture
Audio Passthrough
ARC/eARC Port
eARC: Dolby Atmos Over Dolby Digital Plus
eARC: Dolby Digital Plus 7.1
eARC: LPCM 7.1 Over Dolby MAT
eARC: Dolby TrueHD 7.1
eARC: DTS:X Over DTS-HD MA
eARC: DTS-HD Master Audio 7.1
eARC: LPCM Channels (Bitstream)
ARC: Dolby Digital 5.1
ARC: DTS 5.1
Optical: Dolby Digital 5.1
Optical: DTS 5.1
Total Inputs
HDMI
USB
Digital Optical Audio Out
Analog Audio Out 3.5mm
Analog Audio Out RCA
Component In
Composite In
Tuner (Cable/Ant)
Ethernet
DisplayPort
IR In
HDR Format Support
HDR10
HDR10+
Dolby Vision
HLG
Design
Style
Design Picture
Curved
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Stand
Stand Picture
Back
Back Picture
Wall Mount
Borders
Borders Picture
Borders
Thickness
Thickness Picture
Max Thickness
Build Quality
Build quality picture
Smart Features
Interface
Smart TV Picture
Smart OS
Version
Ease of Use
Smoothness
Time Taken to Select YouTube
Time Taken to Change Backlight
Advanced Options
Ad-Free
Ads Picture
Ads
Opt-out
Suggested Content in Home
Opt-out of Suggested Content
Apps and Features
Apps Picture
App Selection
App Smoothness
Cast Capable
USB Drive Playback
USB Drive HDR Playback
HDR in Netflix
HDR in YouTube
Remote
Remote Picture
Size
Voice Control
CEC Menu Control
Other Smart Features
Remote App
TV Controls
Controls Picture
Mute Switch
In The Box
In The Box Picture
Misc
Power Consumption
Power Consumption (Max)
Firmware
Sound Quality
Frequency Response
Frequency Response
Low-Frequency Extension
Std. Dev. @ 70
Std. Dev. @ 80
Std. Dev. @ Max
Max
Dynamic Range Compression
Digital Room Correction
Distortion
Total Harmonic Distortion
Weighted THD @ 80
Weighted THD @ Max
IMD @ 80
IMD @ Max
Check Price
43"
43S450G
SEE PRICE
Amazon.com
43"
43S551G
SEE PRICE
Walmart.com
50"
50S450G
SEE PRICE
Amazon.com
50"
50S551G
SEE PRICE
Walmart.com
55"
55S450G
SEE PRICE
Amazon.com
55"
55S551G
SEE PRICE
BestBuy.com
65"
65S450G
SEE PRICE
Amazon.com
65"
65S551G
SEE PRICE
BestBuy.com
75"
75S450G
SEE PRICE
Amazon.com
75"
75S551G
SEE PRICE
BestBuy.com
85"
85S450G
SEE PRICE
Amazon.com
85"
85S551G
SEE PRICE
Amazon.com
TCL S4/S450G
TCL S551G
Comments
TCL S4/S450G vs TCL S551G: Main Discussion
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