Which is better for gaming?

The C6 edges ahead with a panel rated up to 165Hz and a 0.1ms response time, plus the newer processor. The C4 still covers 120Hz, VRR, G-Sync and FreeSync Premium across four HDMI 2.1 ports, which is enough for current consoles.

Is the C6 worth stepping up to over the C4?

Yes if you want a 65-inch screen, more brightness and the latest webOS and processor. If a 48-inch set fits your room, the C4 delivers the same core OLED strengths for less.

Which has better picture quality?

The C6, mainly because of Brightness Booster and the a11 Gen3 processor, which lift highlights and upscaling. Both share self-lit OLED pixels, perfect blacks and Dolby Vision.

Both use OLED panels with similar care features; the C6 adds OLED Care to protect the display over time. Panel life depends more on viewing habits than on the model.

Do both support Dolby Vision and Dolby Atmos?

Yes. Both handle Dolby Vision, HDR10 and HLG, and both decode Dolby Atmos. The C6 adds a 2.2-channel speaker setup with a11 AI Sound Pro.

Which is better for a bright room?

The C6, thanks to Brightness Booster. Neither has an anti-glare coating, so either benefits from curtains or blinds opposite the screen.

LG OLED C6 65-inch TV vs LG OLED48C4PUA OLED TV

The LG C6 is the newer, brighter, larger set: a 65-inch OLED evo panel with the a11 Gen3 processor, Brightness Booster, four HDMI 2.1 ports and a 165Hz-capable panel for gaming. The C4 is a 48-inch 2024 model with the a9 Gen7 chip, still excellent for movies and console gaming but smaller and a step behind on brightness and processing. Buy the C6 for a bright living room or a big-screen upgrade; buy the C4 if you sit close, have a smaller wall, or want a proven set at a lower tier. Owners rate both highly, though the C6 carries the stronger rating from far more reviews.

Choose the LG OLED C6 if you want the biggest, brightest picture and the latest processor, webOS and gaming features in one set.
Choose the LG OLED48C4PUA if a 48-inch screen fits your room and you want proven OLED picture quality with full HDMI 2.1 gaming support.

Prices

LG OLED C6 65-inch TV: $899.99 at Amazon (last seen Nov 12)