Michelin is miles ahead in technology
PS2 hands down. It's the best tire for 400+ hp cars. If you drive a 300 hp car or less, this is a non-issue. Wet/dry traction is improved with the PS2 as apposed to the SC3. It is not a coincidence that the PS2 is used on more supercars than any other brand. It has also been proven to give a competitive advantage to other brands at the track. For a couple hundred bucks, PS2 is the way to go.