You can go for SRM Modinagar as it has better placements.
You can also compare both the colleges from the given below link
http://www.engineering.careers360.com/srm-institute-management-and-technology-modinagar/reviews
http://www.engineering.careers360.com/colleges/srm-university-sonipat/review
Good Luck!!
College Comparison based on Courses, Placement, Rank, Fee
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile