Yeah, but Switch doesn't come close to Decks performance in any configuration - there's a staggering amount of games that don't even reach 30fps consistently while looking like a blurry mess.
The performance difference there is stark.
Yeah but the Deck isn't as cool as the Switch
The switch slows itself down when not docked to save battery.
The resolution is lowered in many games too.
My own experience is that it kinda does. Some games run with a noticeably higher frame rate when docked. The fan also gets louder.