I would just get what you like. My boys are older and while they have some interest in pinball, they just don't play much. I can't blame them, I was the same when I was younger. Pinball is hard to get into with all the rules and skills needed to play.
I like GB better than SM but not sure if either has any adult language. I played GB a few times at TPF but it was hard to hear with all the noise. My ST has a family mode setting but it still has a few PG words.