the CFM/clutchmasters setup is organic the spec is kevlar
the kevlar should last 3-4 times longer but will be slightly less grabby. its probably the better of the 2 options for a car that will stay mostly stock and street driven.
'03 VW Jetta TDI - The Daily Commuter
'02 Chevy Corvette Z06 - The Toy
'99 Triumph Daytona - Death Machine