Congrats on the choices! Does the environment of the school matter very much to you? Vanderbilt is going to have MUCH better weather than Northwestern. In the same way, Swarthmore is going to have a way different vibe and feeling than Vanderbilt or Northwestern. If you haven’t visited them all but are able to, I highly recommend it. A school that looks amazing on paper may not be that great to you once you physically visit it.