Brand loyalty, I know a lot of people rockin smith who love oakley and people rockin oakley who love smith as well, but once you've invested into a few pairs of goggles from either brand, its hard to cross over. It's wierd, I would love a pair of smith I/O's, but I have had a couple pairs of c-bars and love em, and just knowing that I have something that I already like and works creates some sort of buyers block for me haha.