Most of the changes are in the cosmetics of the kite. The PRO has some extra detail on the leading edge ends that eliminates the normal REV fraying that you see over time. It also has some extra detail to the trailing edge that helps it maintain its shape better, giving an improvement in overall control. Each panel of the sail is biased which also improves overall control. Custom colors and sail layout design is the biggest advantage in the PRO over the production model.
The B-Pro is a very nice kite and for the tru Rev fanatic, very worth the extra money. For the average flyer, the differences may not be that noticeable. The extra expense for the PRO is really up to the purchaser on if it is worth it or not.
As for tricks, control and flying, in the right hands an EXP will do everything the PRO will.