Which is better for a bright living room?

Neither is the brightest OLED. The LG C4 lists 250 nt and adds Dolby Vision, which helps with bright HDR scenes. The Samsung S84F claims enhanced brightness but lists no figure. For a very bright room, a bright LCD is the safer pick.

Is the LG C4 worth about $357 more?

Yes if you want 65 inches and Dolby Vision. The extra 10 inches is the biggest difference. If budget matters more, the Samsung at $799.99 is the better value.

Which has better HDR support?

The LG C4. It supports Dolby Vision, HDR10 and HLG. The Samsung S84F supports HDR10+ but not Dolby Vision, so Dolby Vision content plays in a fallback format.

Which is better for gaming?

Both are 120 Hz OLEDs with four HDMI inputs. The LG C4 is the more common pick because of its processor and Dolby Vision gaming support. Check the HDMI version on each before buying for 4K 120 Hz.

Both use OLED panels, and neither maker publishes a lifespan figure here. OLED pixels dim over time, and static logos can leave marks. The LG has far more owner ratings (574 versus 58), which gives more real-world data.

Does the Samsung have Dolby Vision?

No. The S84F lists HDR10+ only. Dolby Vision titles will play in HDR10 instead.

Samsung 55” Class S84F Series OLED 4K UHD Samsung Vision AI Smart Tizen TV vs LG 65-Inch Class OLED evo C4 Series 4K Smart TV with Magic Remote (OLED65C4PUA, 2024)

Buy the LG C4 if you want the bigger 65-inch screen, Dolby Vision, and the stronger processor. Buy the Samsung S84F if you want to spend less and sit closer. As of November 5, 2026, the Samsung is $799.99 at Walmart and the LG is $1,157.30 at Newegg.com, a gap of about $357. The LG has sold as low as $649.99 on November 1, 2026, so its price moves a lot.

Today the Samsung 55” Class S84F Series OLED 4K UHD Samsung Vision AI Smart Tizen TV costs $357.31 less at its best price.

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