What are factors to consider when looking at possible medical schools, as in what differentiates one program from another?
What medical schools you decide to apply to is in part related to what your interest are. If you desire to be a family practitioner, then consider those medical schools which are geared toward that specialty. Likewise, if you have an interest in the neurological sciences look at those medical schools who excel in this area. What it gets down to is pairing your interest with those schools which offer the best educational experience in those fields.
I hope I have been of some help.