Pro Team training is the older version of the shorts (version 1). The chamois is not size specific and the leg gripper is a separate elastic band.
Pro Team II is the updated version of the short. It has a size specific chamois and the leg grippers are integrated into the material of the short. I also found the straps have better stretch on the new shorts, and fit better in general.
Personally I found the updated version of the short to be far more comfortable. YMMV.