Core is almost entirely in-state students and Select is almost entirely OOS. If you are OOS you are unlikely to get a Core interview (it happens, but is rare). If you are OOS I would just take the Select interview rather than holding out hope for a Core interview.
Everyone in Select pays OOS tuition, even if you were a FL resident. In Core there are different tuitions for IS and OOS, and I think IS is ~20k/yr cheaper. Select does M3 and M4 up in Allentown, PA. There is no significant difference in workload between the two programs.
The school might claim something ambiguous about you being a better fit for one program or the other blah blah blah. But med school is med school. Every school/program tries to claim they are unique in some way but that's silly.
For reference, I'm an M3 in Select and I'm overall happy with the program and my experience.