LG UR8000 55" (UHD) vs Vizio M-Series 55"
The Verdict
LG's UR8000 delivers excellent value at $399, featuring a clean 4K IPS LCD panel with solid 300-nit brightness and webOS 23's intuitive interface. Vizio's M-Series commands a $50 premium for notably superior gaming credentials: 120Hz native refresh rate, VRR/ALLM support, and exceptional 8ms input lag versus LG's 15ms. Picture quality diverges significantly,Vizio's Quantum LED reaches 800 nits with Dolby Vision support, substantially outperforming the UR8000's HDR10-only capabilities. Vizio adds Wi-Fi 6, an extra HDMI port, and gaming-focused features that appeal to console players. However, LG's IPS panel provides better viewing angles and simpler operation for casual viewers. Choose the LG UR8000 if budget dominates your priorities and you prioritize everyday streaming; select the Vizio M-Series if you game regularly or demand superior brightness and contrast performance.
Who Should Buy
Buy the LG UR8000 55" (UHD) if…
- →Affordable 55-inch 4K at $399 for budget-conscious buyers
- →webOS 23 smart TV platform with all major streaming apps
- →IPS panel offers wide viewing angles for family rooms
Buy the Vizio M-Series 55" if…
- →120Hz with VRR and 4K@120Hz at under $450 is great for console gamers
- →Dolby Vision and HDR10+ dual support
- →Four HDMI 2.1 ports — enough for every console and streaming device
Category Scores
Pros & Cons
LG UR8000 55" (UHD)
Pros
- Affordable 55-inch 4K at $399 for budget-conscious buyers
- webOS 23 smart TV platform with all major streaming apps
- IPS panel offers wide viewing angles for family rooms
- LG ThinQ AI and Alexa voice control built in
- Lightweight at 27.1 lbs — straightforward wall mount installation
Cons
- IPS LCD has poor contrast — blacks appear grey in dark rooms
- 300 nits brightness is very dim — HDR is essentially non-functional
- 60Hz with no VRR — not suitable for gaming
- 20W audio is tinny — external speakers needed
- No Dolby Vision, Dolby Atmos, or HDMI 2.1
Vizio M-Series 55"
Pros
- 120Hz with VRR and 4K@120Hz at under $450 is great for console gamers
- Dolby Vision and HDR10+ dual support
- Four HDMI 2.1 ports — enough for every console and streaming device
- Wi-Fi 6 and Chromecast built-in for fast streaming
- Quantum color delivers better color volume than basic LED
Cons
- SmartCast OS is slow and has fewer apps than Google TV
- 800-nit brightness is adequate but not impressive for HDR
- No local dimming zones — contrast is limited
- Vizio's long-term software support and update track record is inconsistent
Full Specifications
| Spec | LG UR8000 55" (UHD) | Vizio M-Series 55" |
|---|---|---|
| Body | ||
| VESA mount | 300 x 300mm | 200 x 200mm |
| Weight | 27.1 lbs | 28.0 lbs |
| Dimensions | 48.7 x 28.3 x 3.4 inches | — |
| Dimensions (w/ stand) | 48.7 x 30.4 x 8.4 inches | 48.3 x 30.4 x 10.6 inches |
| Audio | ||
| Output (watts) | 20 | 20 |
| Speakers | 2.0ch | 2.0ch |
| Dolby Atmos | ||
| Gaming | ||
| VRR (Variable Refresh Rate) | ||
| ALLM | ||
| Input lag (ms) | 15 | 8 |
| Display | ||
| HDR | HDR10, HLG | Dolby Vision, HDR10+, HLG |
| Size | 55" | 55" |
| Type | IPS LCD | Quantum LED |
| Resolution | 3840 x 2160 (4K) | 3840 x 2160 (4K UHD) |
| Refresh rate | 60Hz | 120Hz (native) |
| Brightness (nits) | 300 | 800 |
| Smart TV | ||
| Os | webOS 23 | SmartCast OS |
| Voice assistant | LG ThinQ AI, Alexa | Google Assistant, Apple AirPlay 2, Chromecast |
| Connectivity | ||
| Wi-Fi | Wi-Fi 5 | Wi-Fi 6 (802.11ax) |
| Ethernet | ||
| Bluetooth | 5.0 | 5.0 |
| USB ports | 1 | 1 |
| HDMI ports | 3 | 4 |
| Processor | ||
| Chipset | — | IQ Active Processor |
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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