The stage two has a higher tourqe capability than std.
It drives / feels like a std clutch.
Competition Clutch Stage 2 Steelback Brass Plus Clutch Kit Subaru STI 2004-2015 15030-2100 at RallySportDirect.com
The stage three is suited for higher than std power out puts. I can tell you it feels like a std clutch does. You can still ride / slip the clutch when you need to.
http://www.rallysportdirect.com/Comp...mic-Clutch-Kit