Definitely look at the University of Rochester since Physics/Science (and presumably research) are his thing. It seems like an ideal fit. I’d see him as a likely for admit.
If you want a safety many kids of that caliber use, go with Pitt (if he likes it) because they’re rolling admissions and you’d have your answer quickly. While many students use it as a safety, a fair number of those find it becomes their #1 choice once they visit. It’s a good school. But between the two, Rochester is superior for Physics IMO. Pitt would just be a true safety even though I expect he would get in at Rochester.