-- Last Updated: Feb-06-13 6:37 PM EST --
Don't think I claimed the Carbon/Kevlar hull is less durable; you're putting your beliefs on my keyboard, and old, anecdotal, beliefs at that!
The combi, dual material layup may be more durable than the all Kevlar layup, maybe not, but it no doubt performs better in the context it was designed for; citizen racing.
Certainly Wenonah is not replacing two Kevlar layers with one carbon. Yes, Wenonah could special order atypical fabric weights, but chances are they do not. We'd need the lamination schedules, which are probably closely guarded, to guess at differential durability and fairly exhaustive testing to determine if any guess, even one based on real information, was correct.
OP should get what he likes, I do not consider either laminate a particularly rugged tripping choice.