Hello aspirant,

*Both are good options but if you are getting chance to get admission in SRM main campus then, you should go for it. But also consider your interest choice and convineance before making any decisions .

* And also amrita is listed in QS world ranking as top private university from india(i dont think so srmis there). ... and both amrita and srm are accrideted by NAAC with highest grade as A (but still when it comes to point amritais slightly higher score than srmout of 5.As i have mentioned it is your decision to make in which college you wanna join.

*And to make it more clear you can check the ratings  and reviews through given below links:-

1)SRM university Chennai :- http://www.engineering.careers360.com/colleges/srm-university-chennai

2)Amrita school of engineering, coimbatore http://www.engineering.careers360.com/colleges/amrita-school-of-engineering-coimbatore

Hope it helpful. A