Hello, I think choosing the branch should depend on the area of your interest .If you are interested in software you can go for information technology in mgit  and the placements will almost be equal to that of CSE and if you are really interested in mechanical then you can go for cbit .First decide the branch and then you can go with it .As per the Ranking cbit stands better than mgit but not only college the branch also plays a specific role. The branch must be chosen based on your interest.

Hope this helps you.