I’d let her decide since they’re all the same cost. Pitt may be further away, but there’s an airport and train station in the city.
Students do the best where they are happiest.
Pitt does have a nice pre-med set-up with half a dozen hospitals right around campus making it easy to volunteer and shadow and they know what they are doing with guidance, etc. It’s a common destination for pre-meds who like an urban environment.
That said, I still see no reason at all that she can’t decide for herself. Have you been able to visit the schools? If not, can you work visits in to her top contenders?