Which is better for gaming?

Both handle 4K at 120Hz with VRR and HDMI 2.1, so input lag is low on either. The LG's four full HDMI 2.1 ports make it easier to keep several consoles and a PC connected at once.

Is the bigger LG worth stepping up to?

If your seating distance is long, the extra six inches on the LG make a visible difference. At closer range the Sony's processing and screen-based audio are the stronger draw.

Which has better sound without a soundbar?

The Sony's Acoustic Surface Audio+ drives sound through the panel, which keeps dialogue anchored to faces. The LG decodes Dolby Atmos, which gives more surround effect but from downward-firing drivers.

Which handles reflections better?

Neither is strong in a very bright room. The Sony has a reflective coating that shows bright sources, and the LG uses a standard glossy OLED finish.

Do both support the main HDR formats?

Yes, both are HDR sets and handle the common formats. Check the specific format list for each if you rely on one particular standard.

Both use OLED panels with similar longevity expectations and both offer pixel-shift and logo-dimming style protections. Neither has a durability edge worth choosing on.

Sony Bravia 8 II 77-inch OLED TV vs LG OLED83C24LA

Both are big-screen OLEDs with 4K, 120Hz, HDMI 2.1 and VRR, so the split is size versus processing. The LG C2 gives you an 83-inch panel, four HDMI 2.1 ports and Dolby Atmos, which suits a large, bright living room and console gaming. The Sony Bravia 8 is a 77-inch set built around the Cognitive Processor XR and Acoustic Surface Audio+, and reviewers consistently favor Sony's motion handling and out-of-box picture accuracy. Owners of both report strong contrast and wide viewing angles; the LG is the more established 2022 model with a large body of user ratings, while the Sony is newer.

Choose the Sony Bravia 8 if you sit closer, care most about motion, upscaling and accurate color, and want sound that comes from the screen itself.
Choose the LG C2 if you want the biggest picture for a wide room, need four full HDMI 2.1 inputs for consoles and a PC, and want Dolby Atmos built in.

Prices

Sony Bravia 8 II 77-inch OLED TV: $2,299.99 at Amazon (last seen Nov 11)