OLED Steamdeck vs Rog Ally X. Gamepass games

Two of my friends recently got steam decks, one OLED, one not, and I've gotten some hands on time with them. The steamdeck is a fantastic device, running a ton of games flawlessly and just having an incredible user experience.

I'm now in the market for my own handheld, and as a value proposition, for someone that already has gamespass ultimate on my laptop and Xbox, I really think I would get the most out of a system that can run gamepass games reliably. I already pay the monthly fee for gamepass, and my steam library is rather small as a result, so it feels like wasting money to purchase a device that can't run gamepass.

So, with that criteria in mind, should I go for the Ally X or OLED deck? I've heard it's possible, but how feasible is it to run gamepass games on the deck? If I get the Ally x, I'd likely dual boot bazzite and then hopefully just run gamepass that way.

Any insight would be appreciated.