I bought the Beach style, but now I want the Caymans.
The Beach style comes in S, M, and L instead of regular shoe sizes. The Caymans come in regular (whole, not half) sizes. Their appearance is the same. I just think that I'd get a better fit with the Caymans than I do with my beach pair. That said, the Beach pair is pretty comfortable. I've been wearing them with socks so far because it's chilly here.