Which is better: SRM, HINDUSTAN, SASTRA, GITAM university?

I am a student at SRM, so I will tell you particularly about my university.

SRM is a highly-graded university with experienced faculty, rich academics, and a good campus life. My experience of SRM has been quite pleasant up till now. You’ll learn a lot at this place, and develop excellent communication skills. You’ll be given good projects. 

This university has a highly diverse population and a multidisciplinary approach to studies. It has a good reputation and a decent placement record. IT and CSE students get on-campus placements for sure. However, for Aerospace, only 1 or 2 companies visit the campus with job offers. Companies like Byjus and Jaro Education offer around 13 LPA and are open to all engineering branches. 

I would personally recommend SRM for your studies as it offers an all-around development with decent placements.