100% AMD, for sure. AMD won’t make much problems and works ootb.
Nvidia on the other hand… if you already have a Nvidia GPU, then the proprietary drivers work pretty well, but even those won’t work flawlessly and still cause problems for many people.
And the FOSS drivers are still in the early stages and won’t cut it. So why spend lots of money for a piece of hardware that won’t give you the performance you paid for?
Also, Nvidia clearly doesn’t care about PCs or its’ users, so why support such a shitty company with your money?
There is also F-Droid for FOSS software if you’re interested, and Obtainium for stuff that’s not available on F-Droid. Maybe check that out?