If you aim for Wall street, which place is better?
First, you need to get into both highly competitive schools before you can make that choice. But IMO the answer is Wharton. Harvard does not have an undergraduate business school although it is possible for students who have done well there to get a job in consulting etc.
Probably Wharton, but it doesn’t really matter - both Harvard and Penn graduates have very good prospects of going to Wall Street post-graduation. It’s a prime destination for graduates of both schools.
Probably Wharton, but not by much. If you are a Wharton person you probably wouldn’t be happy at Harvard and vice versa.