LG B4 55" vs Samsung S90C 55" (4K OLED)
The Verdict
Both 55-inch OLED TVs deliver exceptional picture quality, but they cater to different priorities. LG's B4 excels with superior gaming responsiveness,its 1ms input lag crushes Samsung's 6ms, making it the clear choice for competitive gamers. Samsung's S90C counters with brighter peak luminance (1300 vs 1100 nits), QD-OLED technology for slightly better color accuracy, and a thinner profile at 0.4 inches. Audio specs are nearly identical with 40W Dolby Atmos support. LG runs webOS 24 while Samsung offers Tizen; both integrate major voice assistants seamlessly. At $400 less, the LG B4 represents superior value for gaming-focused viewers and those prioritizing responsiveness. Samsung's S90C justifies its premium through marginally superior brightness and design elegance, appealing to cinephiles and movie enthusiasts. For most buyers, LG's competitive gaming advantage and lower price make it the smarter choice.
Who Should Buy
Buy the LG B4 55" if…
- →Lowest-cost entry into LG's OLED lineup with the same perfect blacks
- →All four HDMI ports with VRR and ALLM at 4K@120Hz for gaming
- →Dolby Vision and Dolby Atmos at an entry OLED price
Buy the Samsung S90C 55" (4K OLED) if…
- →QD-OLED at $1,599 is the most affordable OLED with quantum dot color
- →Infinite contrast ratio with perfect black levels
- →144Hz with VRR — excellent for PS5 and Xbox Series X gaming
Category Scores
Pros & Cons
LG B4 55"
Pros
- Lowest-cost entry into LG's OLED lineup with the same perfect blacks
- All four HDMI ports with VRR and ALLM at 4K@120Hz for gaming
- Dolby Vision and Dolby Atmos at an entry OLED price
- webOS 24 is one of the best smart TV interfaces available
Cons
- Only two HDMI 2.1 ports — the other two are HDMI 2.0 (limited to 4K@60Hz)
- α8 processor is noticeably weaker than the C4's α9 for upscaling and processing
- Lower peak brightness than the C4 or G4 — HDR highlights lack some punch
- No Wi-Fi 6, which limits wireless bandwidth in crowded network environments
- OLED burn-in risk remains a concern for heavy static-content users
Samsung S90C 55" (4K OLED)
Pros
- QD-OLED at $1,599 is the most affordable OLED with quantum dot color
- Infinite contrast ratio with perfect black levels
- 144Hz with VRR — excellent for PS5 and Xbox Series X gaming
- Vivid, wide color gamut coverage exceeds traditional WOLED
- Ultra-slim panel at 0.4 inches looks stunning mounted
Cons
- 55-inch S90C uses a different (WOLED) panel in some regions — verify before buying
- No Dolby Vision support
- 40W audio is weaker than the S95C — soundbar recommended
- Wi-Fi 5 only on the 55-inch model
Full Specifications
| Spec | LG B4 55" | Samsung S90C 55" (4K OLED) |
|---|---|---|
| Body | ||
| VESA mount | 200 x 200mm | 300 x 300mm |
| Weight | 41.9 lbs | 33.5 lbs |
| Dimensions (w/ stand) | 48.4 x 32.1 x 10.5 inches | 48.2 x 30.2 x 9.3 inches |
| Dimensions | — | 48.2 x 27.7 x 0.4 inches |
| Audio | ||
| Output (watts) | 40 | 40 |
| Speakers | 2.0ch | 2.1ch |
| Dolby Atmos | ||
| Gaming | ||
| VRR (Variable Refresh Rate) | ||
| ALLM | ||
| Input lag (ms) | 1 | 6 |
| Display | ||
| HDR | Dolby Vision IQ, HDR10, HLG, Filmmaker Mode | Quantum HDR OLED, HDR10+, HLG |
| Size | 55" | 55" |
| Type | OLED | QD-OLED |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K) |
| Refresh rate | 120Hz | 120Hz (144Hz via Game Mode) |
| Brightness (nits) | 1100 | 1300 |
| Smart TV | ||
| Os | webOS 24 | Tizen OS |
| Voice assistant | ThinQ AI, Alexa, Google Assistant | Bixby, Alexa, Google Assistant |
| Processor | ||
| Chipset | α8 Gen 7 AI Processor 4K | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 5 |
| Ethernet | ||
| Bluetooth | 5.0 | 5.2 |
| USB ports | 3 | 2 |
| HDMI ports | 4 | 4 |
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This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
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