There are many things to consider when choosing a school. Most schools seem to have something of a hybrid system, but there are a few that are quite far to one side or the other. Some people work better on their own, others really need structure.
Different setups work best for different people.
Asking the students at that school is a good way to find out the balance. For instance, in cardio you learn all about the normal behavior of the heart, all the different diseases of the heart and vascular system, and the drugs used to treat them. Pitt, again, has something of a combination. There are some general basic science classes which you start out with, then you move on to organ systems where you learn in a more integrated fashion. Also when you take the boards the sciences are integrated.