The Michelin Pilot SX GT is going to be smoother, quieter and a better dry performer, thus making it the tire that I like better. The SP9000 does have an advantage however and that is the wet performance. The 9000 is a much better wet tire. So I guess it really depends on your specific needs, but overallI like the SX GT. If you would like to chat about it please call me direct and I will be happy to do so, thanks, and thanks for your patience, Aaron 800.428.8355 x395