LG B4 55" vs LG UT70 50"
The Verdict
LG's B4 OLED delivers premium picture quality with perfect blacks, superior brightness at 1100 nits, and full gaming features including 120Hz refresh rate and 1ms input lag,ideal for cinephiles and competitive gamers. Its Dolby Vision IQ, 40W audio with Dolby Atmos, and α8 processor justify the $1199 price tag. Conversely, the UT70 LED provides excellent value at $329, offering 4K resolution and smart TV essentials in a lighter 50-inch package, though its 300-nit brightness, 60Hz refresh rate, and 14ms input lag reflect its budget positioning. Both share webOS 24 and voice assistants. Choose the B4 for superior contrast, gaming responsiveness, and home theater ambitions; select the UT70 if budget constraints matter more than cutting-edge performance.
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 LG UT70 50" if…
- →webOS 24 smart TV platform at budget pricing — best-in-class software for the price
- →AI-assisted upscaling from the α5 processor improves SD/HD content
- →Magic Remote with point-and-click navigation included
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
LG UT70 50"
Pros
- webOS 24 smart TV platform at budget pricing — best-in-class software for the price
- AI-assisted upscaling from the α5 processor improves SD/HD content
- Magic Remote with point-and-click navigation included
- Lightweight and easy to mount at 21 lbs
- Supports Alexa, Google Assistant, and Apple AirPlay 2
Cons
- 60Hz panel — no 120Hz or VRR for gaming
- Low brightness limits HDR impact
- No Dolby Vision — only basic HDR10
- Narrow viewing angles typical of budget VA panels
Full Specifications
| Spec | LG B4 55" | LG UT70 50" |
|---|---|---|
| Body | ||
| VESA mount | 200 x 200mm | 200 x 200mm |
| Weight | 41.9 lbs | 21.2 lbs |
| Dimensions (w/ stand) | 48.4 x 32.1 x 10.5 inches | 44.1 x 28.2 x 8.3 inches |
| Audio | ||
| Output (watts) | 40 | 20 |
| Speakers | 2.0ch | 2.0ch |
| Dolby Atmos | ||
| Gaming | ||
| VRR (Variable Refresh Rate) | ||
| ALLM | ||
| Input lag (ms) | 1 | 14 |
| Display | ||
| HDR | Dolby Vision IQ, HDR10, HLG, Filmmaker Mode | HDR10, HLG |
| Size | 55" | 50" |
| Type | OLED | LED |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K UHD) |
| Refresh rate | 120Hz | 60Hz |
| Brightness (nits) | 1100 | 300 |
| Smart TV | ||
| Os | webOS 24 | webOS 24 |
| Voice assistant | ThinQ AI, Alexa, Google Assistant | ThinQ AI, Alexa, Google Assistant |
| Processor | ||
| Chipset | α8 Gen 7 AI Processor 4K | α5 AI Processor 4K Gen 7 |
| Connectivity | ||
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 5 (802.11ac) |
| Ethernet | ||
| Bluetooth | 5.0 | 5.0 |
| USB ports | 3 | 1 |
| HDMI ports | 4 | 3 |
Related Comparisons
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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