For some games it's perfect, others more dubious. If you look up what you're interested in on protondb it can give you a good idea of the odds things will work well on your setup.

Honestly gaming with either is feasible. HDR in general on the Linux desktop is just in an early phase. I think AMD is just better supported because it’s the hardware the Steam Deck runs on and the fact that AMD is way more open-source friendly.

I’ve seen people on Reddit report issues with both types of card, so it’s really just try it and see for your particular setup.