Tell us what difference you know of graduates of “top tier” versus “middle tier” or “lower tier” medical schools. Will you want an MD or DO? Or is a DO considered “lesser” too?
This hierarchy mentality about undergrad simply has very little relevance in med schools.
Some better known schools are more geared for research or academia – and retention rates for some of the lesser tiers may be lower – but what does that mean to you? Upon graduation, everyone takes the same board exams.
I’m not saying there’s NO difference. I’m saying there should be little difference to you at this moment.