Which is better for PS5 or Xbox Series X gaming?

The TCL Q Class. It supports up to 120Hz VRR through Game Accelerator 120 and has ALLM. The Samsung Q60A is a 60Hz set, so it caps console output at 60 frames per second.

Does the Samsung Q60A support Dolby Vision?

No. It handles HDR10, HDR10+ and HLG. The TCL Q Class adds Dolby Vision, which matters on Netflix and Disney+ titles mastered in it.

Which has better sound without a soundbar?

The TCL. It has Dolby Atmos decoding and DTS Virtual:X, plus an enhanced dialogue mode. The Samsung uses a 20W 2.0 channel setup with no Atmos.

Is the Samsung worth stepping up to over the TCL?

Only if you prefer Tizen or want Samsung's brand support. On features the TCL leads: more HDR formats, a 120Hz game mode, Atmos, and more screen sizes.

Neither has a clear reliability edge from owner reports. The TCL is a newer line, so it will likely get smart-platform updates for longer than the 2021 Samsung.

Can I use AirPlay with these TVs?

The TCL Q Class has AirPlay 2 and Chromecast built in. The Samsung Q60A relies on its own screen mirroring and does not list AirPlay 2.

TCL Q Class QLED Google TV vs Samsung QN65Q60AA 65" 4K QLED TV

The TCL Q Class is the stronger pick for most shoppers. It adds Dolby Vision and HDR10+, Dolby Atmos, a 120Hz VRR game mode, Google TV with AirPlay and Chromecast, and a fourth HDMI input. The Samsung Q60A is a 2021 set with a solid Tizen platform and good color from quantum dots, but it tops out at 60Hz, has three HDMI ports, and uses 20W stereo speakers. Owners of both report similar everyday picture quality; the TCL wins on features per dollar and gaming, the Samsung on brand support and interface polish.

Choose the TCL Q Class if you want Dolby Vision, a 120Hz VRR game mode, Google TV with AirPlay, or the widest choice of screen sizes from 50 to 85 inches.
Choose the Samsung Q60A if you prefer the Tizen smart platform and Samsung's app ecosystem, and you mainly watch movies and shows at 60Hz.

Prices

TCL Q Class QLED Google TV: $44.95 at eBay (last seen Nov 10)