There is nothing wrong w/ the pro, but the hyper-loop is simply fantastic. Watching the 3 or 4 balls spiraling around that loop at 90mph is a thrill every time. When someone sees it for the first time it's jaw dropping. It's the only machine that I have ever had in the premium version & it's well worth it.
On the other hand, you could essentially have the same gameplay w/ the pro minus the hyper-loop thrill. If you go pro, save the extra $ towards a JP3. Sorry to confuse you even further.