I bought the Michelin Pilot XGT V 225/60-15s
. The Sports seem to be more for dry use.
The difference in pricing would seem to be from sizing.
I've had Pilots on the bird for the 3.5 years that I've had it, so it's difficult to compare to other brands. These were new this spring. I have been more than happy with them. I have noticed quite a bit of squeal on hard turns. That's not an issue for me as long as they maintain grip, which they always have. There is a lot of rain here in the Vancouver area, and they handle great in the wet.
I do 4.5 hour trips every second weekend, running up to speeds of 90 mph and the ride is sweet. Very solid and smooth.
The wear has been good, but then again, I am not heavy into hard driving and couldn't do a burn-out with the bird if I wanted to. At any rate, the rated life of the tire is not high.
I have a 3.8L na in the 92 with 3.27 trac-Loc. It runs well, no delay from a stop. The tires are a half inch shorter than stock, which makes the effective gear ratio 3.42. That said, I can usually get a chirp out of the tires.
I got the Michelins because I do a lot of highway speed with many curves. I like them and would buy again.
Don't know if this helps. I would expect the performance of the tires to be very similar.