Last year a medical student from UPR- RCM told me in step scores goes UPR>SJB>UCC>PONCE. But that doesn't matter much because it may be pass or fail for your class. Match Rate is 88-90% in all the schools that vary from year to year.
Pros from SJB it required a research publication before graduating, at least obligated you will have research. It is also very focused on you getting community service and it uses NBME exams, SJB is accredited until 2026-2027 I think and way cheaper than the others.
Ponce's pros are bigger class size, pass or fail grading system with honors, flip classroom so classes are more discussions that learning (maybe a con depends on the person), big location and facilities, AOA, accredited until 2024
UCC pros: AOA
CONS
Ponce: Flipped classroom, pretty expensive, low step score compare to others, far from la metro where big hospitals are, big class more competition for AOA
SJB: no AOA, little underrated in Puerto Rico
UCC: Pretty expensive, accreditation is in probation
Cons of the three: low tier medical school, little to almost none residency programs associated with the school
AOA just matter if you think you can be a top-five to ten percent in your class
AOA is the medical school honor association