It's been a few years so their drivers are largely fine. As long as you play more popular games they should run just fine. At this point it's pretty rare for a game to not run/run so unbearably bad that it's unplayable. The Arc will probably get your better performance per dollar, but the RX will be a more consistent experience. (This feels like talking about amd 15 years ago lol)

Ran an Arc A750 for a couple of years. Perfectly capable card. Don‘t expect miracles of performance@4k but it could hold its own on modern games (BG3, CS2, Helldivers2). Mostly ran 1440. (also old games like Company of Heroes.. but not really stressing the card with that one)

Also ran it in Linux for quite a while. Set and forget there. It was easily a smooth card. I‘m a fan of Arc. I‘m running a 7900xtx these days as I snagged one cheap, but I‘d easily look at Arc again. I‘ve heard Battlemage is really a good step up.

AMD. Because well known. Works good. Lasts a long time, FSR.

ARC is fine on Windows. Drivers have really matured.

Linux.... Is getting better, but you'll want AMD for now.

Do you like to try new things? Have things fail for obscure reasons?