The problem with this question is that most NVIDIA owners will have experience based on a very different stack than you will experience.
NVIDIA and Wayland have had very big problems that have only recently been resolved. If you are using a very up-to-date distribution then you will have a great experience ( see other comments here about EndeavourOS for example ). If you have a distribution that does not have the latest, there will probably be issues.
AMD has been the clear go-to choice for Linux for years. It is still a safe bet. The safest bet based on history. That said, AMD does have issues as well and with the NVIDIA issues now resolved it is not as clear cut. NVIDIA may actually be the better choice.