Is the education same in NMIMS Mumbai and NMIMS Bangalore for BBA?

The curriculum of both campuses is the same. Only the faculties are different but they stay in touch and discuss the course and curriculum with each other. Both campuses have the same training and workshops. 

Academically there is not much of a gap, only the campus experience will differ but even that is not much different as both are in India's top cities, so exposure wise both are the same as well. The exam paper, pattern, review, and assessment process are the same too. So, nothing to worry about, and it all depends on you like how you spend the 2 years on campus.