You should definitely go with BITS Goa. The physics faculty at the institute is really good and no one can reiterate this enough. If you happen to take courses like Mechanics and OScil, you will realize this in the first year itself.
Moreover, the college festival, Waves, is a major highlight. Many discussions regarding the best departments in the college have always had synchronous replies with physics being the major answer. The faculty members are well versed in the field and are dedicated individuals.
But if you are still confused, you must know that the curriculum and syllabus are the same on all three campuses. Your degree will finally specify that you graduated from BITS Pilani.