just to bring up an alternative, i love my pilot road 2 tires on my XB. im way faster on my XB than my 1125CR which has corsa IIIs. I know this because, i had a couple of friends tell me so. I had the bikes up on stands and i sat on the bike and tucked and they said that i looked way faster and more comfy on the XB than i did on the CR.
also, while the bikes were on the stands... we threw rocks on the PR2s and the corsa IIIs and more rocks stuck on the PR2 tires than the latter. this means the PR2s have more grip.
lastly, we spun the front tires like a wheel of fortune then we stopped it with our hands, we measured the how long it took for the tires to stop spinning and found that the PR2s stopped faster, which shows better stopping power than the corsa IIIs.