<p>Princeton has more focus on undergrad academics - you are more likely to have close relations with faculty, especially in large departments. That’s very helpful when applying to grad schools.
Social life is very different - Harvard is pretty good at encouraging mixing between students of different backgrounds, Princeton is still dominated by eating clubs, which tend to be more homogeneous. And the food is so bad at Princeton, you pretty much have to join an eating club or starve.</p>