Notice: Your browser is not supported or outdated so some features of the site might not be available.
Products
TCL S551G
TCL Q550F
Tested using Methodology v1.11
Updated Jul 28, 2025 02:59 PM
SEE PRICE
Amazon.comTested using Methodology v1.11
Updated Feb 10, 2025 01:50 PM
SEE PRICE
Amazon.com
Resolution4k
TypeLED
Sub-TypeVA
Resolution4k
TypeLED
Sub-TypeVA
Our Verdict
TCL S551G
TCL Q5/Q550F QLED
The TCL S551G and the TCL Q550F are very similar, although the S551G uses Google TV while the Q550F uses Amazon's Fire TV OS. The Q550F has the better contrast and is the brighter of the two TVs, but the S551G has a wider viewing angle, making it better suited for wide seating arrangements. It also has the slightly better image processing overall.
Variants
- 43S551G (43")
- 50S551G (50")
- 55S551G (55")
- 65S551G (65")
- 75S551G (75")
- 85S551G (85")
- 43Q550F (43")
- 50Q550F (50")
- 55Q550F (55")
- 65Q550F (65")
- 75Q550F (75")
- 85Q550F (85")
Check Price
43"
43S551G
Searching
Finding store43"
43Q550F
Searching
Finding store50"
50S551G
Searching
Finding store50"
50Q550F
Searching
Finding store55"
55S551G
Searching
Finding store55"
55Q550F
Searching
Finding store65"
65S551G
Searching
Finding store65"
65Q550F
Searching
Finding store75"
75S551G
Searching
Finding store75"
75Q550F
Searching
Finding store85"
85S551G
Searching
Finding store85"
85Q550F
Searching
Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.2
6.9
24p Judder
10
2.2
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 400x400
VESA 200x200
Borders
Borders Picture
Borders
0.33" (0.9 cm)
0.31" (0.8 cm)
Thickness
Thickness Picture
Max Thickness
2.60" (6.6 cm)
2.83" (7.2 cm)
Build Quality
7.0
6.5
Build quality picture
Picture Quality
Contrast
6.7
7.2
Contrast Picture
Contrast
6,766 : 1
9,353 : 1
Native Contrast
6,766 : 1
9,353 : 1
Blooming
10
10
Blooming Photo
Lighting Zone Transitions
10
10
Preferred LD Video, Moving Object
Local Dimming
No
No
Backlight
Direct
Edge
Dimming Zones Count Of Tested TV
N/A
N/A
Contrast And Dark Details In Game Mode
7.0
8.0
Blooming Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
HDR Brightness
5.9
6.9
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
304 cd/m²
334 cd/m²
Yellow Skyscraper (~700 cd/m²)
217 cd/m²
316 cd/m²
Landscape Pool (~300 cd/m²)
159 cd/m²
265 cd/m²
Peak 2% Window
355 cd/m²
403 cd/m²
Peak 10% Window
355 cd/m²
399 cd/m²
Peak 25% Window
355 cd/m²
397 cd/m²
Peak 50% Window
355 cd/m²
396 cd/m²
Peak 100% Window
355 cd/m²
397 cd/m²
Sustained 2% Window
355 cd/m²
400 cd/m²
Sustained 10% Window
355 cd/m²
398 cd/m²
Sustained 25% Window
355 cd/m²
396 cd/m²
Sustained 50% Window
355 cd/m²
396 cd/m²
Sustained 100% Window
355 cd/m²
396 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.001
HDR Brightness In Game Mode
5.9
6.9
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
306 cd/m²
330 cd/m²
Yellow Skyscraper (~700 cd/m²)
217 cd/m²
316 cd/m²
Landscape Pool (~300 cd/m²)
161 cd/m²
253 cd/m²
Peak 2% Window
355 cd/m²
396 cd/m²
Peak 10% Window
356 cd/m²
396 cd/m²
Peak 25% Window
356 cd/m²
424 cd/m²
Peak 50% Window
356 cd/m²
431 cd/m²
Peak 100% Window
355 cd/m²
430 cd/m²
Sustained 2% Window
355 cd/m²
395 cd/m²
Sustained 10% Window
356 cd/m²
395 cd/m²
Sustained 25% Window
356 cd/m²
398 cd/m²
Sustained 50% Window
355 cd/m²
430 cd/m²
Sustained 100% Window
355 cd/m²
430 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.007
PQ EOTF Tracking
9.0
8.9
PQ EOTF Graph
600 Nit Tracking Delta
0.0067
0.0071
1000 Nit Tracking Delta
0.0067
0.0071
4000 Nit Tracking Delta
0.0067
0.0071
SDR Brightness
7.0
7.4
Real Scene Peak Brightness
310 cd/m²
330 cd/m²
Peak 2% Window
358 cd/m²
428 cd/m²
Peak 10% Window
353 cd/m²
428 cd/m²
Peak 25% Window
350 cd/m²
428 cd/m²
Peak 50% Window
347 cd/m²
428 cd/m²
Peak 100% Window
346 cd/m²
428 cd/m²
Sustained 2% Window
356 cd/m²
427 cd/m²
Sustained 10% Window
352 cd/m²
427 cd/m²
Sustained 25% Window
348 cd/m²
427 cd/m²
Sustained 50% Window
347 cd/m²
427 cd/m²
Sustained 100% Window
345 cd/m²
427 cd/m²
Automatic Brightness Limiting (ABL)
0.002
0.000
Color Gamut
8.0
7.8
Wide Color Gamut
Yes
Yes
Color Gamut DCI-P3 Picture
DCI P3 xy
88.94%
85.22%
DCI P3 uv
94.52%
91.29%
Color Gamut Rec.2020 Picture
Rec 2020 xy
64.85%
63.41%
Rec 2020 uv
71.16%
73.15%
Color Volume
7.1
7.1
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
57.8%
55.6%
2020 Color Volume ITP Picture
10,000 cd/m² Rec 2020 Coverage ITP
26.2%
26.0%
White Luminance
355 cd/m²
395 cd/m²
Red Luminance
75 cd/m²
84 cd/m²
Green Luminance
253 cd/m²
295 cd/m²
Blue Luminance
26 cd/m²
23 cd/m²
Cyan Luminance
279 cd/m²
315 cd/m²
Magenta Luminance
101 cd/m²
104 cd/m²
Yellow Luminance
327 cd/m²
372 cd/m²
Pre Calibration
6.1
6.4
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE
5.82
4.50
Color dE
2.79
3.72
Gamma
2.15
2.16
Color Temperature
6,199 K
6,278 K
Picture Mode
Movie
Movie
Color Temp Setting
Warm -5
Warm
Gamma Setting
2.2
0
Post Calibration
9.5
8.5
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE
0.15
0.30
Color dE
1.35
3.53
Gamma
2.20
2.20
Color Temperature
6,509 K
6,535 K
White Balance Calibration
20 point
11 point
Color Calibration
Yes
No
Gray Uniformity
7.0
6.3
50% Uniformity Picture
50% Std. Dev.
4.153%
5.373%
50% DSE
0.221%
0.236%
5% Uniformity Picture
5% Std. Dev.
0.732%
1.086%
5% DSE
0.079%
0.098%
Black Uniformity
10
9.6
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
N/A
N/A
Native Black Uniformity Picture
Native Std. Dev.
0.284%
0.497%
Viewing Angle
6.1
5.1
Viewing Angle Video
Chroma Graph
Color Washout
33°
31°
Hue Graph
Color Shift
54°
22°
Lightness Graph
Brightness Loss
39°
31°
Black Level Raise
18°
13°
Gamma Shift
16°
11°
Reflections
7.6
7.5
Reflections Picture
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Semi-gloss
Semi-gloss
Total Reflections
4.8%
5.1%
Indirect Reflections
0.6%
0.4%
Calculated Direct Reflections
4.2%
4.7%
HDR Native Gradient
6.8
6.3
HDR Gradient Picture
100% Black to 50% Gray
6.0
4.0
50% Gray to 100% White
8.0
6.0
100% Black to 50% Red
6.0
6.0
50% Red to 100% Red
8.0
8.0
100% Black to 50% Green
4.0
6.0
50% Green to 100% Green
8.0
6.0
100% Black to 50% Blue
6.0
6.0
50% Blue to 100% Blue
8.0
8.0
Low-Quality Content Smoothing
6.0
4.8
Low-Quality Content Smoothing Picture
Smoothing
5.5
3.0
Detail Preservation
7.0
9.0
Upscaling: Sharpness Processing
5.5
6.0
Sharpness Picture - 480p
Pixels
Pixels Picture
Subpixel Layout
BGR
BGR
Type
LED
LED
Sub-Type
VA
VA
Motion
Response Time
7.9
7.7
Motion Blur Picture
Response Time Chart
80% Response Time
4.8 ms
5.2 ms
100% Response Time
13.1 ms
14.3 ms
Flicker-Free
2.1
2.2
Backlight chart
Flicker-Free
No
No
PWM Dimming Frequency
150 Hz
160 Hz
Black Frame Insertion (BFI)
BFI Picture
BFI Frequency Picture
Optional BFI
No
No
Min Flicker For 60 fps
150 Hz
160 Hz
60Hz For 60 fps
No
No
120Hz For 120 fps
No
No
Min Flicker for 60 fps in Game Mode
150 Hz
160 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
Stutter
7.4
7.6
Frame Hold Time @ 24 fps
28.6 ms
27.4 ms
Frame Hold Time @ 60 fps
3.6 ms
2.4 ms
24p Judder
10
2.2
Judder-Free 24p
Yes
No
Judder-Free 24p via 60p
Yes
No
Judder-Free 24p via 60i
Yes
No
Judder-Free 24p via Native Apps
Yes
Yes
Variable Refresh Rate
8.2
7.1
Native Refresh Rate
60 Hz
60 Hz
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
120 Hz
60 Hz
1080p VRR Minimum
< 20 Hz
48 Hz
1440p VRR Maximum
120 Hz
60 Hz
1440p VRR Minimum
< 20 Hz
48 Hz
VRR + Local Dimming
No Local Dimming
No Local Dimming
Inputs
Input Lag
9.7
9.7
1080p @ 60Hz
10.5 ms
10.8 ms
1080p @ 60Hz Outside Game Mode
161.7 ms
114.6 ms
1080p @ 120Hz
6.6 ms
N/A
1080p @ 144Hz
N/A
N/A
1440p @ 60Hz
10.7 ms
10.8 ms
1440p @ 120Hz
6.4 ms
N/A
1440p @ 144Hz
N/A
N/A
4k @ 60Hz
10.5 ms
10.7 ms
4k @ 60Hz + 10-Bit HDR
10.4 ms
10.8 ms
4k @ 60Hz @ 4:4:4
10.5 ms
10.7 ms
4k @ 60Hz Outside Game Mode
160.9 ms
130.6 ms
4k @ 60Hz With Interpolation
160.8 ms
131.6 ms
4k @ 120Hz
N/A
N/A
4k @ 144Hz
N/A
N/A
8k @ 60Hz
N/A
N/A
Supported Resolutions
8.2
7.1
Resolution
4k
4k
480p @ 59.94Hz (Widescreen)
Yes
Yes
720p @ 59.94Hz
Yes
Yes
1080p @ 60Hz @ 4:4:4
Yes
Yes
1080p @ 120Hz
Yes
No
1080p @ 144Hz
No
No
1440p @ 60Hz
Yes (forced resolution required)
Yes
1440p @ 120Hz
Yes
No
1440p @ 144Hz
No
No
4k @ 60Hz
Yes
Yes
4k @ 60Hz @ 4:4:4
Yes
Yes
4k @ 120Hz
No
No
4k @ 120Hz @ 4:4:4
No
No
4k @ 144Hz
No
No
8k @ 30Hz or 24Hz
No
No
8k @ 60Hz
No
No
PS5 Compatibility
PS5 Screenshot
Auto Low Latency Mode (ALLM)
Yes
Yes
4k @ 120Hz
No
No
1440p @ 120Hz
Yes
No
1080p @ 120Hz
Yes
No
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
Yes
No
1080p @ 120Hz
Yes
No
HDR
Yes
Yes
VRR
Yes
Yes
Inputs Specifications
HDR10
Yes
Yes
HDR10+
Yes
No
Dolby Vision
Yes
Yes
HLG
Yes
Yes
HDMI 2.0 Full Bandwidth
Yes (HDMI 1,2,3)
Yes (HDMI 1,2,3)
HDMI 2.1 Class Bandwidth
No
No
CEC
Yes
Yes
HDCP 2.2
Yes (HDMI 1,2,3)
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
3
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)
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
Sound Quality
Frequency Response
6.3
4.9
Frequency Response
Low-Frequency Extension
134.54 Hz
160.00 Hz
Std. Dev. @ 70
3.96 dB
5.39 dB
Std. Dev. @ 80
4.01 dB
5.43 dB
Std. Dev. @ Max
4.52 dB
5.26 dB
Max
87.2 dB SPL
83.3 dB SPL
Dynamic Range Compression
2.53 dB
2.48 dB
Distortion
7.3
6.1
Total Harmonic Distortion
Weighted THD @ 80
0.045
0.064
Weighted THD @ Max
0.222
0.402
IMD @ 80
2.10%
15.74%
IMD @ Max
10.47%
43.09%
Smart Features
Interface
8.0
7.5
Smart TV Picture
Smart OS
Google TV
Fire TV
Version
12
6520056.1
Ease of Use
Average
Easy
Smoothness
Very Smooth
Average
Time Taken to Select YouTube
1 s
4 s
Time Taken to Change Backlight
2 s
4 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
8.0
Apps Picture
App Selection
Great
Great
App Smoothness
Very Smooth
Average
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
Amazon Alexa
TV Controls
Controls Picture
In The Box
In The Box Picture
Misc
Power Consumption
54 W
37 W
Power Consumption (Max)
188 W
94 W
Firmware
V8-R75PT01-LF1V174
Fire OS 8.1.1.3 (RS8113/2344)
Check Price
43"
43S551G
Searching
Finding store43"
43Q550F
Searching
Finding store50"
50S551G
Searching
Finding store50"
50Q550F
Searching
Finding store55"
55S551G
Searching
Finding store55"
55Q550F
Searching
Finding store65"
65S551G
Searching
Finding store65"
65Q550F
Searching
Finding store75"
75S551G
Searching
Finding store75"
75Q550F
Searching
Finding store85"
85S551G
Searching
Finding store85"
85Q550F
Searching
Finding store
TCL S551G
TCL Q5/Q550F QLED
Comments
TCL S551G vs TCL Q550F: 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.