Which is better: KIIT or SRM?

It is a very subjective question and the choice is ultimately yours to make. I would, though, give you some insight on KIIT.

The faculty at KIIT is very helpful. The teachers guide us whenever we need help. There is a strict no-ragging policy on campus and the seniors are amazing. We engage in a lot of extra-curricular activities besides study. KIIT Fest is really good and everyone looks forward to it. 

Both KIIT and SRM have great faculty and placement records. Both institutions offer good opportunities. You should choose according to your personal preferences. For making an informed decision, I would recommend you talk to the students from both institutions and also do some basic research at your end.