Amrita University is a deemed university whereas SSN is an autonomous institute in Chennai, affiliated with Anna University. I have friends in both universities and according to their first-hand experience, Amrita has a slight edge over SSN. While both colleges offer good quality education, here are some reasons why you should prefer Amrita University.
Overall, both the colleges are great in terms of education and facilities. However, Amrita University is the best choice when it comes to TNEA colleges except for Anna University, Guindy. At the end of the day, all that matters is your hard work and passion for the subject.