there is a thread for ya, might help ya out with some info. but it pretty much comes down to a personal preference. they are both good shifters. i've got the pro 5.0 and it works great.
The Pro 5.0 also places 3rd and 5th almost out of reach unless you sit in a position where you hug the steering wheel like a little old lady. I'm only 6'0" and where I sit with my seat, 3rd and 5th are almost out of reach. So I bought a new handle that is adjustable to fix this. Otherwise, the shifting action is great with the 5.0.