On the 10R I ran the Pilot Power 2CT on the track twice, they were okay. But on the end of the 2nd track day, i lost grip in the rear and lowsided... They do get greasy and slick on hot days after repeated use.
I tried the Dunlop Sportmax GP-A (i think formerly called 208?) and I liked them a lot better. Though they were 55 profile instead of 50, which helped a bit I'm sure. End of the 2nd trackday on them and they were still sticky as hell.
Gonna try BT-003 on the 6R later this month.