A comparison of specs, key information, reviews, and best pricing from top retailers
Last updated -- hours ago | Report incorrect information
Company ProductName Specs
Company ProductName Specs
Advantages of the LG B4 (OLED)
- Excellent for dark room
- Excellent for movies & TV
- Very good for sports
- Very good for use as monitor
- Best in class viewing angle
- Excellent reflections
Advantages of the Sony X90J (LCD)
- Best in class for upscaling
- Best in class motion processing
Key differences
Picture Quality
8.8
7.8
10/10
CONTRAST
7.63/10
8.1/10
COLOR VOLUME SCORE
7.4/10
WOLED
PANEL TYPE
LED FALD
WBC
PANEL SUB-TYPE
VA
The LG B4 (OLED) has very good picture quality, while the Sony X90J (LCD) has good picture quality.
Movies & TV
9.2
7.9
10/10
CONTRAST
7.63/10
10.0/10
BLACK UNIFORMITY
6.4/10
7.0/10
UPSCALING
10.0/10
Yes
HDR10 SUPPORT
Yes
No
HDR10+ SUPPORT
No
Yes
DOLBY VISION SUPPORT
Yes
The LG B4 (OLED) is excellent for movies & TV, while the Sony X90J (LCD) is good.
Sports
8.3
7.1
8.0/10
MOTION PROCESSING
10.0/10
120Hz
REFRESH RATE
120Hz
10.0/10
INPUT LAG SCORE
7.0/10
7.0/10
UPSCALING
10.0/10
7.1/10
SDR BRIGHTNESS SCORE
8.6/10
Yes
HLG SUPPORT
Yes
The LG B4 (OLED) is very good for sports, while the Sony X90J (LCD) is good.
Gaming
8.9
8.2
9.4/10
RESPONSE TIME SCORE
8.0/10
10.0/10
INPUT LAG SCORE
7.0/10
8.0/10
MOTION PROCESSING
10.0/10
100.0/100
GAMING LOCAL DIMMING
80.0/100
7.5/10
GAME HDR BRIGHTNESS SCORE
8.2/10
The LG B4 (OLED) and Sony X90J (LCD) are both very good for gaming, though the LG B4 (OLED) is somewhat better.
News, Talk, & Other TV
8.3
8.9
7.1/10
SDR BRIGHTNESS SCORE
8.6/10
7.0/10
UPSCALING
10.0/10
The Sony X90J (LCD) and LG B4 (OLED) are both very good for news, talk, & other TV, though the Sony X90J (LCD) is somewhat better.
Let Us Help Find Your Perfect TV
Find your new TV
Key similarities
Cartoons & Animation
8.7
8.3
8.3/10
COLOR GAMUT SCORE
7.0/10
8.1/10
COLOR VOLUME SCORE
7.4/10
7.1/10
SDR BRIGHTNESS SCORE
8.6/10
8.5/10
COLORS OUT OF THE BOX SCORE
9.0/10
9.5/10
GRAY UNIFORMITY
6.8/10
The LG B4 (OLED) and Sony X90J (LCD) are both very good for cartoons & animation.
Bright Room
7.3
7.6
9.5/10
VIEWING ANGLE
5.2/10
7.1/10
SDR BRIGHTNESS SCORE
8.6/10
7.2/10
HDR BRIGHTNESS SCORE
7.9/10
9.2/10
REFLECTIONS SCORE
5.9/10
The Sony X90J (LCD) and LG B4 (OLED) are both good for bright room.
Cost
$1,000
$993
$400
$600
$800
$1,000
$1,200
$1,400
$1,600
The LG B4 (OLED) has a price of $1,000 and the Sony X90J (LCD) costs $993.
Give feedback
We’re constantly working to improve.
How the LG B4 (OLED) and the Sony X90J (LCD) compare to other TVs
Spec Comparison
 |  | |
| LG B4 (OLED) | Sony X90J (LCD) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,000 | $993 | ||
Brand | |||
Brand | LG | Sony | |
Release Date | |||
Release Date | March 1, 2024 | April 2, 2021 | |
Full name | |||
Full name | OLED55B4 | XR-55X90J | |
Screen Size | |||
Screen Size | 55" | 55" | |
Screen Resolution | |||
Screen Resolution | 4K | 4K | |
TV FEATURES | |||
|---|---|---|---|
Operating System | |||
Operating System | WebOS | Android TV | |
Sound Quality Score | |||
Sound Quality Score | 7/10 | 7.3/10 | |
NextGen Ready | |||
NextGen Ready | No | Yes | |
HDMI Ports | |||
HDMI Ports | 4 | 4 | |
Coax Ports | |||
Coax Ports | 1 | 1 | |
DISPLAY QUALITY SCORES | |||
|---|---|---|---|
Picture Quality Score | |||
Picture Quality Score | 8.9/10 | 7.8/10 | |
Bright Room Score | |||
Bright Room Score | 7.4/10 | 7.7/10 | |
Gaming Score | |||
Gaming Score | 9/10 | 8.2/10 | |
Movies & TV Score | |||
Movies & TV Score | 9.3/10 | 7.9/10 | |
Sports Score | |||
Sports Score | 8.3/10 | 7.1/10 | |
PHYSICAL | |||
|---|---|---|---|
Dimensions w/o Stand (H x W x D) | |||
Dimensions w/o Stand (H x W x D) | 48.3" x 27.9" x 1.8" | 28" x 48.5" x 2.8" | |
Dimensions with Stand (H x W) | |||
Dimensions with Stand (H x W) | 48.3" x 30.4" x 9.3" | 30.9" x 48.5" | |
Weight without Stand | |||
Weight without Stand | 31.5 lbs | 38.4 lbs | |
VESA Mount | |||
VESA Mount | 300 x 200 | 300 x 300 | |
DISPLAY | |||
|---|---|---|---|
Color Depth | |||
Color Depth | 10 bit | 10 bit | |
Black Frame Insertion | |||
Black Frame Insertion | Yes | Yes | |
Auto Low Latency Mode | |||
Auto Low Latency Mode | Yes | Yes | |
Contrast | |||
Contrast | 10/10 | 7.6/10 | |
Local Dimming | |||
Local Dimming | 10/10 | 8/10 | |
SOUND | |||
|---|---|---|---|
Speaker Setup | |||
Speaker Setup | 2.0 | 2.0 | |
Speaker Power | |||
Speaker Power | 20 W | 20 W | |
Dolby Atmos | |||
Dolby Atmos | Yes | Yes | |
DTS:X | |||
DTS:X | Yes | Up to DTS Digital Surround, Bypass only | |
Get a great deal on the LG B4 (OLED) or the Sony X90J (LCD)
About LG
LG, a prominent TV brand from Korea, has played a significant role in popularizing OLED TVs. OLED technology is hailed as the future of TV technology. Their TVs employ WebOS, a proprietary smart TV software that not only offers seamless functionality but also includes gaming-specific features, earning praise from players worldwide. Often regarded as the gateway to unparalleled viewing experiences, LG's mid-range OLEDs come highly recommended, making them a worthwhile investment for those willing to stretch their budget for superior quality.
About Sony
Sony stands as a highly experienced and widely trusted TV manufacturer, earning a reputation that surpasses all others. A Japanese company, Sony has been making TVs for far longs than it has been making Playstation game consoles. Sony's high-end TVs are often regarded as the ultimate choice for videophiles, representing the epitome of quality, albeit at a premium price point. Renowned for their advanced and precise motion handling, as well as their cutting-edge local dimming algorithms, Sony consistently delivers unparalleled performance in these areas. They include Google TV software with all their TV sets, which grants access to the largest selection of apps available and they also include Bravia Core which is a movie streaming platform specifically for Sony TVs that offers higher picture quality by using more bandwidth.
Give feedback
We're constantly perfecting our model
TV guides you might be interested in
More comparisons for you
FAQs
FAQs about TVs
Why trust us
This information was produced and vetted by the PerfectRec TVs team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest TV information and makes it digestible for you.
By the numbers
385
TVs evaluated
33,110
TVs stats compiled
21
Proprietary TVs ratings developed
122,130
Recommendations made
18,320
Consumer hours saved
About the TV team
Joe Golden, Ph.D
CEO and TVs Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
Jason Lew
Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.
Chandradeep Chowdhury
Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
Jaime Roldán
TVs Expert
Jaime is a Colombia-based TV expert. He is an electronics engineer with 8 years of experience in the telecom sector and has been making TV recommendations for 12 years.
Featured in
