we have stayed at both.. Just got back from VV on Sunday.
Vistana - we stayed in the older section.. and i really really didnt like it.
However I saw the newer section rooms and they were great.
Vistana Villages is a smaller resort which I personally prefer. we stayed in Building 1 which I am assuming is the oldest building? Its the closest to the pool.
it was very clean, a little cluttered for my preference, but it was nice. Well equiped. We had a two bed apartment (no lock off) - with a king in the master suite, and two doubles in the other room. The apartment has everything you can imagine you might need.
I liked it, and we would go back..but never go back to Vistana - I would never chance being in the older section again. no way!