If you are getting admission in SRM main campus then you should go for it as both are the good colleges and have got almost same rating and reviews but the only drawback is Manipal is bit expensive as compare to other colleges like SRM, VIT, BITS etc. And if you talk about the branches then better to go for the one in which you are more interested and in which you can do really well.

To check about both the college's rating and reviews, you can go through below links -

SRM University, Chennai

Manipal Institute of Technology, Manipal

Hope this helps!!!

SRM University Chennai

Admissions Courses & Fees Placements Reviews

Shortlist

Brochure

MIT Manipal

Admissions Courses & Fees Cutoff Placements Reviews

Shortlist

Brochure