I ran a fresh set of Pilot Race tires on a Honda F4 last week on the track, they stick well and slide more predictably than I had been led to believe. I didn't think the wear was that bad, either, although a Busa is pretty heavy, so I dunno.
I have 207GPs on the Busa now, I like them just fine, the Michelin has a steeper crown and will probably square off faster. Great on their sides, though.