These two resorts are about the farthest apart as far as themeing goes as two resorts could be. It really just depends on your personal preference. Our family really enjoys the theming and atmosphere at the Beach Club. We like the lighter colors and the beach / sand castle / sea shell theme. Oh, and then there is the 5 minute walk to Epcot, that just can't be beat anywhere.
They are both deluxe resorts so you really can't go wrong either way.