If you want to specialize go to UPenn but if you are okay with staying as GP go to LECOM. As a LECOM grad, something that you have to get used to is having to explain where LECOM is because nobody knows about this school.
LECOM would be a really cool school so you really can't go wrong with either school. What is the total cost of tuition/everything after 4 years at UPenn and LECOM?
If UPenn is really your dream school, I would probably go there... See if you can get a scholarship or anything like that. Have you looked at HSPS?