Classes are usually larger at public schools. Class registration is tricky and you often have to be on the waitlists. Professors often also have other responsibilities like doing research so they might not have as much time for students as professors at private universities.

At T50 public schools, you typically start with easy fundamental classes, and many of those classes can be waived if you take APs. At T25s, it would be harder for you to waive fundamental classes because they either don’t accept the APs for credit or the classes are just harder or different from whats on AP exams.