LG B4 55" vs TCL 6-Series R655 55" (Mini-LED QLED)
The Verdict
LG's B4 OLED delivers superior picture quality with perfect blacks, infinite contrast, and exceptional color accuracy that OLED technology provides, though its 1100-nit peak brightness trails the TCL's 1500 nits in bright rooms. Gaming performance slightly favors LG with 1ms input lag versus TCL's 7ms, both supporting VRR and ALLM at 120Hz. TCL's Mini-LED QLED offers impressive brightness and value at $749, making it compelling for bright viewing environments, but lacks OLED's dimensional depth and color fidelity. LG's webOS with ThinQ AI provides more flexible smart features compared to TCL's Google TV, though both support major voice assistants. Audio is comparable (40W vs 30W), both with Dolby Atmos. For $450 less, TCL provides solid 4K gaming and HDR performance; however, LG's OLED superiority justifies the premium for cinephiles and competitive gamers prioritizing picture quality and response time. LG B4 is the stronger choice for enthusiasts; TCL suits budget-conscious buyers.
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 TCL 6-Series R655 55" (Mini-LED QLED) if…
- →Best picture quality under $800 — Mini-LED at this price is remarkable
- →Supports both Dolby Vision AND HDR10+ — covers every HDR format
- →1500 nits peak brightness rivals TVs costing twice as much
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
TCL 6-Series R655 55" (Mini-LED QLED)
Pros
- Best picture quality under $800 — Mini-LED at this price is remarkable
- Supports both Dolby Vision AND HDR10+ — covers every HDR format
- 1500 nits peak brightness rivals TVs costing twice as much
- 4K@120Hz with VRR and ALLM — excellent for PS5 and Xbox Series X
- Google TV platform with wide app support and Chromecast built-in
Cons
- TCL software updates are slower and less frequent than Samsung/LG
- Build quality and remote feel budget-oriented
- Some blooming around bright objects on dark backgrounds
- Sound quality from 30W speakers is average — soundbar recommended
Full Specifications
| Spec | LG B4 55" | TCL 6-Series R655 55" (Mini-LED QLED) |
|---|---|---|
| Body | ||
| VESA mount | 200 x 200mm | 300 x 300mm |
| Weight | 41.9 lbs | 37.3 lbs |
| Dimensions (w/ stand) | 48.4 x 32.1 x 10.5 inches | 48.2 x 30.4 x 11.3 inches |
| Dimensions | — | 48.2 x 27.8 x 3.0 inches |
| Audio | ||
| Output (watts) | 40 | 30 |
| Speakers | 2.0ch | 2.0ch |
| Dolby Atmos | ||
| Gaming | ||
| VRR (Variable Refresh Rate) | ||
| ALLM | ||
| Input lag (ms) | 1 | 7 |
| Display | ||
| HDR | Dolby Vision IQ, HDR10, HLG, Filmmaker Mode | Dolby Vision, HDR10+, HDR10, HLG |
| Size | 55" | 55" |
| Type | OLED | Mini-LED QLED (VA LCD) |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K) |
| Refresh rate | 120Hz | 120Hz |
| Brightness (nits) | 1100 | 1500 |
| Smart TV | ||
| Os | webOS 24 | Google TV |
| Voice assistant | ThinQ AI, Alexa, Google Assistant | Google Assistant |
| Processor | ||
| Chipset | α8 Gen 7 AI Processor 4K | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 6 |
| Ethernet | ||
| Bluetooth | 5.0 | 5.0 |
| USB ports | 3 | 1 |
| 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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