What kind of question is this?
They are two totally different devices. Not just for usage but price points lol.
If you want to play Nintendo games then get a Switch. If you want the cheapest desktop Mac experience then buy the Mini.
I have a Switch and was going to buy a Mac Mini. I was waiting on the M2 revision. They serve two very different purposes. A Switch is for playing games and I'd have replaced my PC with the Mac for browsing the internet, email, office work, photo editing, etc.