The carbon will be marginally lighter, and stiffer (better cornering and tracking in performance riding situations) and absorb a bit more high frequency vibration. Any difference in eating up the big bumps can be more than compensated for by playing with the type of tire you run. So if you have the money and think you will appreciate any of those advantages and losing about .5 lbs off your, bike go for it. I was considering the same fork for my Cross Check but decided the minor performance difference wouldn't be worth the money for the type of riding I do, plus I liked the looks of the lugged crown once I saw it on the bike. Its really a princess and the pea sort of situation so just do what will make you happy.