Pro-lites have the ASA in the gripframe and have a different valve/hammer. They are the older of the two. After the pro-lite came the 68 Carbine, which introduced the 45 frame and the CVX valve. It had a shorter and, to me, more fragile feed collar and a small detachable front grip. The Pro-carbine combined the 45 frame, and CVX valve of the 68 with the front grip/feed collar of the pro-lite. As far as I know parts are compatible between 68 Carbines and Pro-carbines, but not between those two and pro-lites. There may be a few exceptions such as the ball detent and such, but valves and hammers no.
This link has lots of diagrams and manuals -including most things Tippmann. You should be able to find both there. http://www.bountyhunterspaintball.com/armory/