Which is better for gaming, the C6 or the M5?

The C6. It lists four HDMI 2.1 ports, up to 165Hz VRR, G-Sync, FreeSync Premium and a 0.1ms response time. The M5's gaming specs are not stated, so do not assume parity.

Is the 77-inch M5 worth stepping up to over the 55-inch C6?

Only if room size and movie immersion matter more than gaming and confirmed features. The M5 gives you 22 more inches of OLED; the C6 gives you a fuller, better-documented feature set.

Both use OLED panels with similar burn-in risk, so lifespan depends on viewing habits. Avoid leaving static logos or news tickers on for hours, and use screensavers and pixel-shift settings on either set.

Do both support Dolby Vision and Dolby Atmos?

The C6 explicitly lists Dolby Vision, HDR10, HLG and Dolby Atmos with 40W 2.2 audio. The M5's listed specs do not confirm either, so check the full spec sheet before buying for a Dolby setup.

How far should I sit from each?

About 6 to 8 feet suits the 55-inch C6 for mixed viewing. The 77-inch M5 is better at 9 to 12 feet, where a 55-inch screen starts to look small.

Which has better smart TV features?

The C6 runs webOS 2026 with Google Gemini, Microsoft Copilot, AirPlay and Google Cast. The M5 runs webOS but its version and AI features are not stated.

LG OLED evo C6 55" 4K Smart TV vs LG M5 Series OLED evo 77-Inch TV

Both are LG OLED evo sets, so picture quality is close: perfect blacks, wide viewing angles and Dolby Vision. The 55-inch C6 is the gaming pick, with four HDMI 2.1 ports, up to 165Hz VRR, G-Sync and FreeSync Premium, and a 0.1ms response time. The 77-inch M5 wins on size and immersion for movies and sports, but its sparse spec sheet and 2025 release make it the less proven choice for fast gaming. Buyers and reviewers consistently praise LG OLED for contrast and design; the trade-offs are brightness versus mini-LED rivals and OLED burn-in risk with static content.

Choose the LG C6 if you sit close, game on a console or PC, or want the most complete feature set in a 55-inch OLED.
Choose the LG M5 if you have a large room, watch mostly movies and sports, and want the biggest OLED picture for the space.

Prices

LG OLED evo C6 55" 4K Smart TV: $949.00 at Greentoe (last seen Nov 10)