The diablo corsas rock. Great grip, nice feedback and they warm up very quickly even in cold temps. Mileage is the only negative, as I got less than 2k miles out of my last set, but for me, it's only a minor inconvenience as the most important thing to me is grip, grip, grip and feedback which inspires confidence. Can't say I've tried the diablos, but if they're similar to the Sportec M-1's, not a bad tire. Front was a little vague, not as much grip and for a harder compound tire, mileage was not very good, just slightly better than the diablo corsas, but overall, a good tire nonetheless.
Mike