It depends upon many factors. Essentially, both schools will serve you well. Are you from Vermont or Maine? If so, then I'd choose Vermont because of financial aid. Mainers, I believe, if eligible, recieve up to $25,000 in forgivable loans from their home state. And instate for Vermont is reasonable.
BU has a traditional first two years that follows most schools. Vermont allows you to start clerkships after 18months. BU has greater diversity of patients. BU serves the underserved in an urban setting.
Housing near BU is crazy expensive. Burlington isn't cheap, but cheaper. You're lucky, both are good schools and you'll be fine in either place.
Good luck.