A comparison of specs, key information, reviews, and best pricing from top retailers
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Company ProductName Specs
Company ProductName Specs
Advantages of the LG B4 (OLED)
- Very good for bright room
- Excellent for dark room
- Excellent for gaming
- Excellent for news, talk, & other TV
- Excellent for use as monitor
- Best in class viewing angle
- Best in class reflections
Advantages of the Sony A90K (OLED)
- Excellent for sports
- Best in class for upscaling
- Best in class motion processing
Key differences
Sports
8.5
9.1
8.0/10
MOTION PROCESSING
10.0/10
120Hz
REFRESH RATE
120Hz
10.0/10
INPUT LAG SCORE
7.0/10
8.0/10
UPSCALING
10.0/10
8.0/10
SDR BRIGHTNESS SCORE
6.3/10
Yes
HLG SUPPORT
Yes
The Sony A90K (OLED) is excellent for sports, while the LG B4 (OLED) is very good.
Bright Room
8.3
6.7
9.5/10
VIEWING ANGLE
8.8/10
8.0/10
SDR BRIGHTNESS SCORE
6.3/10
8.0/10
HDR BRIGHTNESS SCORE
6.2/10
10.0/10
REFLECTIONS SCORE
8.9/10
The LG B4 (OLED) is very good for bright room, while the Sony A90K (OLED) is only fair.
Cost
$1,300
$1,057
$0
$500
$1,000
$1,500
$2,000
The LG B4 (OLED) has a price of $1,300 and the Sony A90K (OLED) costs $1,057.
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Key similarities
Picture Quality
9.0
8.5
10/10
CONTRAST
10.00/10
8.1/10
COLOR VOLUME SCORE
8.0/10
WOLED
PANEL TYPE
WOLED
WBC
PANEL SUB-TYPE
WBE
Although they have very similar scores, PerfectRec considers LG B4 (OLED) to have excellent picture quality, while the Sony A90K (OLED) has very good picture quality.
Movies & TV
9.2
9.1
10/10
CONTRAST
10.00/10
10.0/10
BLACK UNIFORMITY
10.0/10
8.0/10
UPSCALING
10.0/10
Yes
HDR10 SUPPORT
Yes
No
HDR10+ SUPPORT
No
Yes
DOLBY VISION SUPPORT
Yes
The LG B4 (OLED) and Sony A90K (OLED) are both excellent for movies & TV.
Gaming
9.0
8.8
10.0/10
RESPONSE TIME SCORE
9.4/10
10.0/10
INPUT LAG SCORE
7.0/10
8.0/10
MOTION PROCESSING
10.0/10
100.0/100
GAMING LOCAL DIMMING
100.0/100
8.0/10
GAME HDR BRIGHTNESS SCORE
6.2/10
Although they have very similar scores, PerfectRec considers LG B4 (OLED) to be excellent for gaming, while the Sony A90K (OLED) is very good.
Cartoons & Animation
8.8
8.4
8.3/10
COLOR GAMUT SCORE
8.3/10
8.1/10
COLOR VOLUME SCORE
8.0/10
8.0/10
SDR BRIGHTNESS SCORE
6.3/10
7.9/10
COLORS OUT OF THE BOX SCORE
7.7/10
10.0/10
GRAY UNIFORMITY
9.6/10
The LG B4 (OLED) and Sony A90K (OLED) are both very good for cartoons & animation.
News, Talk, & Other TV
9.0
8.7
8.0/10
SDR BRIGHTNESS SCORE
6.3/10
8.0/10
UPSCALING
10.0/10
Although they have very similar scores, PerfectRec considers LG B4 (OLED) to be excellent for news, talk, & other TV, while the Sony A90K (OLED) is very good.
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How the LG B4 (OLED) and the Sony A90K (OLED) compare to other TVs
Spec Comparison
 |  | |
| LG B4 (OLED) | Sony A90K (OLED) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,300 | $1,057 | ||
Brand | |||
Brand | LG | Sony | |
Release Date | |||
Release Date | March 1, 2024 | June 2, 2022 | |
Full name | |||
Full name | OLED48B4 | 48A90K | |
Screen Size | |||
Screen Size | 48" | 48" | |
Screen Resolution | |||
Screen Resolution | 4K | 4K | |
TV FEATURES | |||
|---|---|---|---|
Operating System | |||
Operating System | WebOS | Android TV | |
Sound Quality Score | |||
Sound Quality Score | 8/10 | 7/10 | |
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 | 9/10 | 8.6/10 | |
Bright Room Score | |||
Bright Room Score | 8.3/10 | 6.8/10 | |
Gaming Score | |||
Gaming Score | 9/10 | 8.8/10 | |
Movies & TV Score | |||
Movies & TV Score | 9.2/10 | 9.1/10 | |
Sports Score | |||
Sports Score | 8.5/10 | 9.2/10 | |
PHYSICAL | |||
|---|---|---|---|
Dimensions w/o Stand (H x W x D) | |||
Dimensions w/o Stand (H x W x D) | 24.3" x 42.2" x 1.8" | 24.6" x 42.1" x 2.4" | |
Dimensions with Stand (H x W) | |||
Dimensions with Stand (H x W) | 26.6" x 42.2" | 24.9" x 42.1" | |
Weight without Stand | |||
Weight without Stand | 32.8 lbs | 29.6 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 | 10/10 | |
Local Dimming | |||
Local Dimming | 10/10 | 10/10 | |
SOUND | |||
|---|---|---|---|
Speaker Setup | |||
Speaker Setup | 2.0 | 2.1 | |
Speaker Power | |||
Speaker Power | 20 W | 25 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 A90K (OLED)
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.
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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
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Recommendations made
12,920
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.
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