What does the A57 give you the NEX 6 doesn't?

I have been really researching the NEX 6 as a second camera, and maybe one day a first, which lead me to look at what something like the A57 can do. With the LAEA2 adapter taking A mount lenses on the NEX, what big ticket specs are different? The big one I see is in body stabilization on the A57 vs. the ability to adapt other brand lenses on the NEX. I wish those were combined.