slipper clutch is normally used on fast road or road race bikes.a bit like the freewheel on your push bike allows hard braking on the rear wheel without needing to dip the clutch.
rekluse is a dirt bike product.turns your bike into a rev and go auto clutch bike. makes it near impossible to stall and allows you to pull a high gear to tame the power in tricky places i have tried them on 2 stroke and 4 stroke bikes and love them.just cant justify the money