In my opinion, NMIMS Mumbai is a much better option than Amity. NMIMS offers a number of specialized BBA courses and the placement scenario is much better at NMIMS than Amity. 

Mumbai is called the Mecca for Finance. It has a better and larger number of MNCs and firms that offer excellent exposure in contrast to Amity where the opportunities will be somewhat limited.

On the basis of the Management program, NMIMS even has better rankings than Amity. 

A table drawing a comparison between the BBA Programs offered at both Amity and NMIMS is shown below