Thank you all!
Ferrari TR, if you click on the photo of your interest, you will be sent to a very interesting webpage written by Don Wheeler, a retired manufacturing engineer who also is a veteran in airbrushing. Everything you want to know is accurately explained there. By the way, my Badger 200, bought in the early Nineties, has the old head, which spits paint after a while, due to building up paint in the spray regulator. As you can see, the Badger 200 sold nowadays has a modified head, which probably don't spit paint anymore. Buy a Badger 350, a Paasche H or anything similar, and you will forget the paint spitting issue forever.