I've got a steam deck. BG3 runs fine on it and surprisingly so does Starfield. (albeit both on low graphics settings, but I'm cool with that). BG3 is also ok because it's turn based. Though, so far, any blips in fps in Starfield haven't messed up my being able to survive firefights.

BG3 has a steeper learning curve for sure. I love the character interactions and the voice acting is superb. Starfield is easier to just pick up and start playing. (though my first time navigating my ship was a WTF moment and the game threw you into a ship battle right away) The early battles are easy enough that even with flailing, you survive. Over time I've gotten more accustomed to the controls. FWIW, NPC dialog and interactions are more janky for sure than BG3. BG3 is so smooth and realistic with dialog and expressions.

Both games have abysmal inventory systems. hahahaha! So far, I'm enjoying both games. I've put BG3 down for a bit to allow time for Larian to clean up Act 3 a bit more. I'm 85 hours in and all of the story threads are coming together and the consequences of my choices are getting thick.

Starfield is a hit with me too. It's a grand exploration game. It scratches the Skyrim itch. It might be a looter shooter, but so far, I'm enjoying the quests. Eventually I will build outposts and build my own ship. There's no VATs any more, except in ship to ship battles where you can use the targeting system.

Unlike BG3, you aren't limited on how much you can develop your character. BG3 is capped at level 12 so you only get a few times to choose new spells/skills/abilities. Eventually, you're at your limit. Starfield has so many skills you can get, that I imagine that once you get many hours in, you'll be at such a high level and have so many skills that it will still be a blast to play. Early on, it's all so new, later on, you'll have so many options for things to do and how to do it that the gameplay will still feel fresh.

Long story short, I like both equally, but for very different reasons. Starfield is a big plate of good ole home cooking/mac and cheese. BG3 is a multi-course gourmet meal. I also have a steam deck, so I imagine that Starfield would play just fine on XBox.