Products
LG B4 OLED
Samsung S90D OLED
Tested using Methodology v2.2
Updated Mar 17, 2026 01:05 PM
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BestBuy.com
Tested using Methodology v2.2
Updated Mar 11, 2026 05:58 PM
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BestBuy.com
Resolution4k
Native Refresh Rate
120Hz
Panel TypeOLED
Sub-Type
WOLED
Dolby Vision
Yes
Screen Finish
Glossy
Resolution4k
Native Refresh Rate
144Hz
Panel TypeOLED
Sub-Type
QD-OLED
Dolby Vision
No
Screen Finish
Glossy
Our Verdict
LG B4 OLED
Samsung S90D OLED
The Samsung S90D OLED is better than the LG B4 OLED. They both look amazing in dark rooms due to their nearly perfect contrast, but the Samsung is noticeably brighter in HDR. The Samsung also has a much wider color gamut, giving it a more impactful HDR viewing experience. Regarding image processing, the Samsung model has much less banding in its HDR color gradients. Still, the LG has slightly better low-quality content smoothing, so streaming content looks a bit cleaner overall. The LG model supports Dolby Vision, while the Samsung instead supports the less widely used HDR10+ format. Finally, the Samsung is superior for PC gamers due to its four 4k @ 144Hz HDMI ports, while the LG is limited to 120Hz on its four ports.
Variants
- OLED48B4AUA (48")
- OLED55B4AUA (55")
- QN42S90DAEXZA (42" (WOLED))
- QN48S90DAEXZA (48" (WOLED))
Check Price
42" (WOLED)
42" (WOLED)
QN42S90DAEXZA
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Samsung.com
48"
OLED48B4AUA
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Amazon.com
48"
48" (WOLED)
48" (WOLED)
QN48S90DAEXZA
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Samsung.com
55"
OLED55B4AUA
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BestBuy.com
55"
55" (QD-OLED)
55" (QD-OLED)
QN55S90DAFXZA
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Samsung.com
65"
OLED65B4AUA
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LG.com
65"
65" (QD-OLED)
65" (QD-OLED)
QN65S90DAFXZA
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BestBuy.com
77"
OLED77B4AUA
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BestBuy.com
77"
77" (QD-OLED)
77" (QD-OLED)
QN77S90DAFXZA
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BestBuy.com
83"
OLED83B4AUA
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LG.com
83"
83" (WOLED)
83" (WOLED)
QN83S90DAEXZA
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Samsung.com
Main Differences for
Mixed Usage
Mixed Usage
Threshold
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)
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.
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 Specifications
Side Inputs Picture
Rear Inputs Picture
HDMI
HDMI 2.1 Rated Speed
ATSC Tuner
USB Ports
USB 3.0
Audio Out 3.5mm
Wi-Fi
Ethernet Speed
Composite In
Digital Optical Audio Out
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
HDR Format Support
HDR10
HDR10+
Dolby Vision
HLG
Design
Style
Design Picture
Curved
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
Ad-Free
Ads Picture
Ads
Opt-out
Suggested Content in Home
Opt-out of Suggested Content
Remote
Remote Picture
Voice Control
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
Check Price
42" (WOLED)
42" (WOLED)
QN42S90DAEXZA
SEE PRICE
Samsung.com
48"
OLED48B4AUA
SEARCH
Amazon.com
48"
48" (WOLED)
48" (WOLED)
QN48S90DAEXZA
SEE PRICE
Samsung.com
55"
OLED55B4AUA
SEE PRICE
BestBuy.com
55"
55" (QD-OLED)
55" (QD-OLED)
QN55S90DAFXZA
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Samsung.com
65"
OLED65B4AUA
SEE PRICE
LG.com
65"
65" (QD-OLED)
65" (QD-OLED)
QN65S90DAFXZA
SEE PRICE
BestBuy.com
77"
OLED77B4AUA
SEE PRICE
BestBuy.com
77"
77" (QD-OLED)
77" (QD-OLED)
QN77S90DAFXZA
SEE PRICE
BestBuy.com
83"
OLED83B4AUA
SEE PRICE
LG.com
83"
83" (WOLED)
83" (WOLED)
QN83S90DAEXZA
SEE PRICE
Samsung.com
LG B4 OLED
Samsung S90D OLED
Comments
LG B4 OLED vs Samsung S90D OLED: Main Discussion
What do you think of these products? Let us know below.
Looking for a personalized buying advice from the RTINGS.com experts? Members have direct access to buying advice on our member forum.
Thanks for the feedback! I have a B4 as my main driver in the living and I love it too, it’s a great TV! There’s no denying it, though, although you might not see the difference with all content, the S90D definitely has brighter and more vivid colors. This won’t come out as much unless both TVs are in their most accurate modes, though, and even then it depends on the specific content you’re watching. Most shows and even movies don’t come anywhere close to reaching the max color saturation even on the B4, so the difference won’t be noticeable.
I disagree with the movie rating being so low on the B4 vs the S90. In fact, the scores should be reversed. I bought a B4 a week ago and was amazed at the picture quality in Dolby Vision streaming. The S90D went on sale and I made the mistake of returning the B4 for the S90. After reinstalling and setting up the Sonos in my theater, I was disappointed with the difference. Despite your article, the S90 on HDR pales in comparison to the B4 in clarity, color and even brightness. I think you must be grading solely on gaming (which I don’t do) because for a movie theater, the LG B4 smokes the S90D. The B4 was also smoother in fast action movie scenes. We watched Extraction last night and the way the scenes jumped around it just wore my eyes out. The LG on the other hand did’t do that. There’s an independent YouTuber out there talking about how he could see the brightness and clarity difference between the C4 and the S90D at Costco. I could see it also but didn’t trust is bcz of reading your article. Your article says the S90 is brighter than the LG. If you mean paler, I could see that. But brighter, no way. So for anyone reading this, don’t be mislead. Samsung made a mistake by not going with Dolby Vision. Hopefully they will correct that. Until then, buy the LG for streaming movies. It’s the better tv by far for less $.
No, that’s just a quirky way the website renders the price variants, the B4 isn’t QD-OLED on any size. In each column it’s only the rows with a price tag and model code that exist in that size/panel variant. We’re aware of this issue and plan on making some tweaks to the way this is rendered, but it’ll take some time.
This comparison lists the LG B4 55, 65, and 77 as being QD-OLED however this is not listed anywhere on the B4 stand alone review page where it only lists WOLED. Is this accurate?