What is the difference between top university like Harvard and typical universities

[skieurope]

@tdy123

For example, a senior concentrator would have priority, followed by a junior concentrator, etc.

While true in theory, I never saw an issue in reality, with the exceptions I already mentioned, and with the possible exception if a specific required course for the concentration. e.g. gov 94. And even then, one can usually find a section of the course, if not their preferred section