Hello Srivally,
Both the institutes mentioned i.e. G. Narayanamma Institute of Technology and Science (GNITS) and CMR Institute of Technology are decent institutes to be in. Now, it is always advisable to go with the choice of your subject between ETM and CSE rather than choosing the brand of college as sooner or later in life this decision will help you succeed.
However, if you don’t have any particular choice as such, consider going for ETM in GNITS as peer interaction and placements are better there.