Which is better for movies?

The LG C4, mainly because it supports Dolby Vision and Dolby Atmos, which most premium streaming catalogs use. The S84H handles HDR10 well but has no Dolby Vision listed.

Which is better for gaming?

Both are 120 Hz OLEDs with low motion blur, so they are close. The C4's four HDMI ports make it easier to keep a console, PC and soundbar connected at once.

Is the LG C4 worth the extra $157?

At $1,157.30 versus $999.99 as of November 5, 2026, yes if you want Dolby Vision and more inputs. If you mostly watch SDR or HDR10 content, the S84H saves money with little loss.

Neither maker publishes an OLED lifespan figure. The C4 has a longer track record with 574 ratings at 4.6/5; the S84H is a 2026 model with too few ratings to judge.

The C4 lists 250 nits, which is modest. Samsung does not publish a figure for the S84H, so compare in-store if your room is bright.

Do both support 4K at 120 Hz?

Yes. Both list 4K resolution and a 120 Hz refresh rate, so both can run 4K/120 from a current console or PC.

LG 65-Inch Class OLED evo C4 Series 4K Smart TV with Magic Remote (OLED65C4PUA, 2024) vs Samsung S84H Series 65" OLED 4K Smart TV

Both are 65-inch 4K OLEDs with 120 Hz panels, so the picture fundamentals are close. The LG C4 is the better-documented, more feature-complete set: four HDMI ports, Dolby Vision, Dolby Atmos, webOS 24 and the Alpha 9 Gen7 processor. The Samsung S84H is the cheaper buy at $999.99 at Best Buy as of November 5, 2026, against $1,157.30 at Newegg.com for the C4. Buy the C4 if you want Dolby Vision and more inputs; buy the S84H if you want to save about $157 and mainly game or stream.

Today the Samsung S84H Series 65" OLED 4K Smart TV costs $157.31 less at its best price.

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