2 piece comes with leather pants man with a 360degree zipper that connects the pant and jacket. 1 piece are for racers and useless for street riding and occasional track days if you even go. They're not user friendly while out in public like a 2piece suit is.
2 piece is your best purchase bikerboy. You also can take your jacket off and look normal/casual in public. I love mine. You can get a new JR GPX-Type R suit for $495 last I looked.
I saw that yesterday and was wanting to see a picture straight above it because I want to see how deep it goes. Looks like the bottomless pit from some of the pictures.