I don't think either school is particularly research oriented, but going through UVM's website it does seem they do quite a bit of research in pulmonology as well as in immunology, and that appears to be where a lot their research funding goes. I honestly don't think either school will be particularly limiting in terms of research opportunities as far as most students are concerned, especially since UVM seems to match a couple people per year into derm, so I think the opportunities are there if want them. I think people who attend UVM are very much a self-selecting group and are really attracted to the strong clinical focus with research being secondary. I really don't know much about Drexel, but I can't imagine your research and clinical opportunities would be limited in Philly. I interviewed at Temple, and Philadelphia seems like it would be a great place to go to med school, especially since it seems like the med schools and hospitals collaborate quite a bit with each other.
Personally, I like UVM better. I like Philadelphia but I like Burlington more, which is odd for me because I generally prefer a more urban location. I think the decision is a very personal one, and I would trust your gut feeling. If your gut feeling isn't strong one way or the other, then I would follow the money when the schools send out their fin aid offers. If the money is the same, I would either choose whichever city you like better or the school that's closer to family.