SRM and VIT are pretty much same in academics and has the same employability record. Both offers excellent courses and provides lots of opportunities.But one is located in chennai and the other one is in vellore. It's up to you whether you want to live in a city or not so city ,otherwise both of them are pretty much same.(Chennai is a very underrated city and there are lot of misconceptions circling about it . In reality it's one of the best livable cities in the country. On the other hand,vellore is calm where you can stay peacefully).

Manipal university is ofcourse a topnotch college in the country and all the courses here are very decent. The university's reputation has always been consistence and pretty much good for researching.

GITAMS falls behind these three universities and better prefer vishakapattanam(vizag) over Hyderabad. Courses here are decent but the college doesn't have a global recognization as above three.

All the best