I can assure you that the engagement is smooter with the race kit. Its like a RZR. No strange noise or "Clunk" when moving in very slow or technical trail.
The majority of sxs model dont use wet clutch and all are very good crawler.
Also, the wet clutch is very limited in size for the weight and Power of that machine.
A lot more failure with a wet clutch if you drive your machine hard. The new Wildcat 1000 and CF 1000 have abandoned the wet clutch...
Anyway its just my 2 cent but for me, just the free reving and much stronger engine worth the price .
The better slow drivability and the lack of strange noise from the clutch is a bonus!