Congratulations on your acceptances!
Deciding where to go is a difficult decision. There's so much to take into account. It's ultimately a decision that only you can make for yourself.
I am in no position to compare the two particular programs that you are deciding between; however, there is certainly an advantage of going to a highly recognized institution over a lesser known institution. I agree with everyone who said that a strong applicant is a strong applicant regardless of where she or he trained. I agree that medical education is fairly standardized and that many of the schools offer comparable experiences. Strong mentorship can be found almost anywhere. Strong students are found at every school. It is entirely possible to match wonderfully in the field of your choice coming from almost any accredited medical school. Nonetheless, having a famous name on your resume will give you a bit of a push assuming that you are an otherwise mature, hard working and successful candidate.
Pathology is not phenomenally competitive, but it has become more competitive in the past couple of years and there are a handful of programs that are particularly competitive due to location, research opportunities, clinical strengths, etc. People tend to enjoy their matches, but not everybody gets their top choice. Also... should you change your mind about pathology and instead apply for a very competitive field such as dermatology, then you will be glad to have your medical school name working for you.
Aside from school prestige, location, gut feeling, and prospective debt are each tremendously important for most applicants. The decision boils down to what is most important for you. Best of luck and congratulations on multiple acceptances!!!