I’m using a Pro because of the compact size. It fits in my pocket easily and doesn’t make me uncomfortable when I sit.
But honestly, I won’t mind a Pro Max in the future if I have to compromise a lot of camera or battery or power features going with the Pro.
Since you got the Air, have you done any video editing? Recently I was about to get a Pro as well but decided to go with the Air because the Pro was out of stock where I live and I didn’t wanna wait. Plus, I think can save a bit of money because I may not be able to fully use it.