Okay, based on my limited experience with the Edge Pro, and what' I've read here and on other sites . . . (and I suggest you do the same)
Pros; solid, proven design . . . its "low" profile and stays in tune . . . locking studs is a major +++++
Cons; None (in my opinion), unless you have a habit of dropping the lock-blocks in the saddles. They can fall out if you turn the guitar over with the screwed turned out.
Pros; solid design . . . lock blocks won't fall out . . . even flatter than the Lo-Pro
Cons' NO LOCKING STUDS!!! (but this can be fixed) . . . saddle inserts can sometimes be badly pressed into the saddle, causing bad to awful string to string height. (but it seems most of the new ones have this fixed)
Both will stay in tune (and as Rich has said on his site, even without locking studs low-neutral will usually come back to tune just fine and many players will never notice the high-neutral after a pull up), both seem to give about the same sustain and tone (you can't swap them on the same guitar to really have a true sustain/tone comparison) and they both use the same type of bar, so finding replacements for them is easy.
How's that? :-D