I'm not one to rave on a new tire unless and until it's well scrubbed in and has spent some time in the twisties.
Initially, I didn't notice any improvement in the PR3's vs the PR2's, but after about 400 miles and warmer road temps, I can now report that the
PR3's feel even more stable and more glued to the twisties than the already great handling PR2's. I've run through 3 sets of PR2's and one set
of Pilot Power 2ct's on two bikes.
After switching off bikes with my son in the twisties Saturday, neither of us felt that his new Pilot Power Pure's ( Ducati Monster TriColor) handled any
better than the PR3's (Aprilia Falco) . The PR3's are also quite stable at higher speeds on the flat stretches .. as were the PR2's.
If I get 4500 miles out of the rear, the PR3's will have worn about the same as all my PR2's, but time will tell.
No rain yet, so a report on the sipes will have to wait.