LG QNED80 55" vs Samsung CU8000 55"
The Verdict
LG's QNED80 and Samsung's CU8000 occupy different market tiers at 55 inches. LG's Quantum Dot NanoCell technology with 700 nits brightness delivers noticeably superior picture quality compared to Samsung's standard LED panel at 300 nits, making it far more suitable for bright rooms and HDR content. Gaming performance heavily favors LG with 120Hz native refresh rate, VRR support, and 10ms input lag versus Samsung's 60Hz panel and 12ms response time. Samsung's CU8000 compensates with aggressive pricing at $399 versus LG's $699, appealing to budget-conscious buyers accepting compromised performance. Audio capabilities remain identical at 20W 2.0ch stereo without Dolby Atmos on both models. LG provides superior connectivity with four HDMI ports and enhanced processing via its α8 AI Processor. For buyers prioritizing picture quality and gaming, LG justifies its premium. Those seeking affordable 4K streaming capabilities without gaming demands should consider Samsung's more accessible entry point.
Who Should Buy
Buy the LG QNED80 55" if…
- →120Hz native panel with VRR at a mid-range price
- →Dolby Vision support for superior HDR compared to HDR10+ only TVs
- →webOS 24 is one of the best smart TV platforms available
Buy the Samsung CU8000 55" if…
- →Very affordable entry into Samsung's 4K smart TV lineup
- →HDR10+ support improves contrast in compatible content
- →Tizen OS is a mature, full-featured smart TV platform
Category Scores
Pros & Cons
LG QNED80 55"
Pros
- 120Hz native panel with VRR at a mid-range price
- Dolby Vision support for superior HDR compared to HDR10+ only TVs
- webOS 24 is one of the best smart TV platforms available
- Four HDMI ports with ALLM for multi-device setups
- Quantum Dot + NanoCell technology improves color accuracy
Cons
- Not OLED — contrast and black levels are significantly behind
- 700-nit brightness is modest for HDR highlights
- 20W speakers are underwhelming — needs a soundbar
- Edge-lit LED can show uneven backlighting in dark scenes
Samsung CU8000 55"
Pros
- Very affordable entry into Samsung's 4K smart TV lineup
- HDR10+ support improves contrast in compatible content
- Tizen OS is a mature, full-featured smart TV platform
- Lightweight and easy to wall-mount at 27 lbs
- Crystal Processor 4K provides decent upscaling from 1080p
Cons
- 60Hz panel — no 120Hz for smooth gaming or sports
- Low peak brightness limits HDR impact
- No VRR or HDMI 2.1 — poor for next-gen consoles
- 20W speakers sound thin — a soundbar is essential
Full Specifications
| Spec | LG QNED80 55" | Samsung CU8000 55" |
|---|---|---|
| Body | ||
| VESA mount | 300 x 300mm | 200 x 200mm |
| Weight | 28.4 lbs | 27.1 lbs |
| Dimensions (w/ stand) | 48.5 x 30.7 x 9.3 inches | 48.8 x 30.8 x 8.8 inches |
| Audio | ||
| Output (watts) | 20 | 20 |
| Speakers | 2.0ch | 2.0ch |
| Dolby Atmos | ||
| Gaming | ||
| VRR (Variable Refresh Rate) | ||
| ALLM | ||
| Input lag (ms) | 10 | 12 |
| Display | ||
| HDR | HDR10, HLG, Dolby Vision | HDR10+, HLG |
| Size | 55" | 55" |
| Type | QNED (Quantum Dot NanoCell) | Crystal UHD LED |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K UHD) |
| Refresh rate | 120Hz (native) | 60Hz |
| Brightness (nits) | 700 | 300 |
| Smart TV | ||
| Os | webOS 24 | Tizen OS |
| Voice assistant | ThinQ AI, Alexa, Google Assistant | Bixby, Alexa |
| Processor | ||
| Chipset | α8 AI Processor 4K | Crystal Processor 4K |
| Connectivity | ||
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 5 (802.11ac) |
| Ethernet | ||
| Bluetooth | 5.1 | 5.2 |
| USB ports | 2 | 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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