Can't tell the difference.

They've just always leaned into it more to streamline the experience, going back as far as the 360. They really have been ahead of the curve in that respect and think it still holds true today. The Switch isn't much optimised for it in my opinion.

If that's what you're into, I'd say take the Xbox. I'm not a big online gamer but for those who are, I think Xbox is the best of all the consoles.

I am very much a casual gamer myself and like single player adventures.

Depends what you want. I love handheld gaming so Switch for me all day long. Plus I've not liked any generation Xbox controller but that is purely personal preference and I have small hands.