Akin to portability, the Steam Deck’s sheer weight is a factor even when it doesn’t leave the house. The SD will sometimes give me strain in my hands or wrists while the switch feels like a feather in comparison. If a game is on both steam and the nintendo eshop, I usually will get it for the switch.
I love my SD a lot, but battery life and weight are influential in a handheld for me.
Interesting, I adore my switch. I love my deck for its capabilities (e.g., modding) but I’ll usually buy a game on the switch if I have the option. For me, it’s much more comfortable to use for extended time whereas the deck is heavy enough that it’ll give me wrist pain for long sessions. The battery difference is underrated here too. It’s nice traveling or hell even on the couch to not have to worry much about battery on the switch.