Both the colleges are good you can opt for any college according to your choice.
If you want to compare both the colleges you can refer below link
http://www.engineering.careers360.com/colleges/jss-mahavidyapeetha-sri-jayachamarajendra-college-of-engineering-mysore
http://www.engineering.careers360.com/colleges/national-institute-of-engineering-mysore
Good Luck!!
College Comparison based on Courses, Placement, Rank, Fee
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile