I wish more people would weigh in, I'd love to hear about Wash U as well and posted a similar question with no answers 🙁
I am happy to share my opinion on Wash U but it might not be much help to you since I did not apply to Brigham and therefore can't compare the two. I agree with you about Wash U though-- really liked the faculty, residents, great reputation and fellowship placement, fantastic research, etc. They definitely seem to work very hard there and maybe seemed more tired/burned out than other residents..? But that's subjective and really hard to gauge with such a snapshot perspective.
Wish someone who goes/went to med school there or did a rotation there or something would weigh in (especially in the next 24 hours please!)
HTH 🙂