Better looks...subject to they eye of the beholder, of course. Otherwise they're great for track use and don't fold, unlike stockers. You can get replacement billet footpegs which offer superior traction and are available in many colors, if that's the issue. Otherwise, billet, and carbon fiber are primarily for looks...though billet aluminum is stronger than factory stuff and, in great quantity, carbon fiber bits are lighter too.
adjustability is top priority
go invest the money
plus it looks 1285 times cooler and nicer
so by all means, save up and buy it
tho some time even with the adjustable rearsets by rizoma on my 620
I feel legs are a bit jammed up, after a while
knees are aching a bit or it could just be the fact that my rizoma
hve to extend outwards to accomodate the pessenger pegs.
so my footrest is quite wide.