I like my Pro PIs. There are several features about the pro version that is very nice. There are more panels of material sewn together such that there is more support and better fit. The material offers less aero drag. We now have the same material on our Voler team kits. There is more material meaning it come up higher (on me) in the waist and in the back. The chamois is very soft material and pretty firm. Now that Voler has the new chamois pad, I doubt that I will buy more PI or others. I got my PI clothes from the PI outlet in Park City, UT. Once you know your size, you can call them and check for sales.