Which is better for a bright living room?

The Samsung S95F. Its Glare Free coating and higher brightness keep the picture clear when sunlight hits the screen. The LG C4 has no anti-glare treatment and reflects more.

Which is better for gaming?

Both are strong. The Samsung reaches 165Hz and has low input lag. The LG has four full HDMI 2.1 ports and G-Sync certification, which suits PC gamers with Nvidia cards.

Does the Samsung S95F support Dolby Vision?

No. Samsung uses HDR10+ instead. The LG C4 supports Dolby Vision, which matters if you watch Dolby Vision content on Netflix, Disney+, or 4K Blu-ray.

Both use OLED panels with similar lifespans. LG has a long track record with OLED and includes pixel refresh features. Neither is clearly more durable, so buy on size and room conditions.

Is the step up to the Samsung worth it?

If you watch in a bright room and want the best picture, yes. If you want a bigger screen and Dolby Vision, the LG C4 is the better fit.

Which has better sound?

The Samsung. Its 4.2.2 channel 70W system with top-channel speakers and Object Tracking Sound+ is clearly stronger than the LG's 2.2 channel setup. A soundbar still helps both.

LG C4 OLED evo 77" 4K Smart TV vs Samsung S95F OLED 4K TV

The LG C4 is the better pick for most people: it comes in a much larger 77-inch size, has four full HDMI 2.1 ports, Dolby Vision, and G-Sync certification, and owners rate it highly for gaming and movies. The Samsung S95F is the stronger TV on picture quality in bright rooms, with its Glare Free coating, higher peak brightness, and 165Hz gaming support, but it is a 65-inch set. Choose the LG for size and Dolby Vision; choose the Samsung if you have a bright room and want the best anti-glare OLED.

Choose the LG C4 if you want a big 77-inch OLED with Dolby Vision, four HDMI 2.1 ports, and G-Sync for gaming.
Choose the Samsung S95F if your room is bright and you want the best glare-free OLED picture with 165Hz gaming.

Prices

LG C4 OLED evo 77" 4K Smart TV: $1,658.73 at Walmart (last seen Nov 1)