I'd have to go with RWJ on this one.
I like the location better, for one. I'd much rather live in jersey than in milwaukee. nyc is very close, and new brunswick is a really fun city.
I also am very interested in primary care modalities and community medicine. They have a great reputation in those areas and have a really good program started by students called HIPHOP. Both programs are more traditional in their curriculum (a turn off for me). I like case-based or pbl style curricula..or atleast a blend of case-based and lecture.
They do give strong preference to NJ residents, but they interview a fair share of applicants from other states.
Have you been admitted to both? It really is all about how you felt at both of the schools. All of my interviews have been great for that reason. I'm one of those people who definitely considers location and living environment. I don't plan on only studying, but plan to become a part of the community wherever I wind up. For that reason, I would choose the greater metropolitan area.