This year I was accepted into two PhD programs (USC and WashU). I had a very specific research interest, and the USC program used to be my first choice, because there were so many professors in the program who worked on this topic. But later I found that the PhD training in WashU was slightly better. So I ended up to WashU.
Now my question is, if the program at WashU is not as good as I expected, is it possible for me to transfer to USC after/during my first year of rotation?
(At the time of my decision, I had conversations with the deputy director of both programs, and they knew I had a tough choice between the two)