It depends whether you want to go to nit agartala or not as if that is not a problem I would advice you to go with nit agartala as first of all it is an nit second it has more exposure and people are coming there from all other parts of the country so definitely that is also an advantage no doubt mmmut is a good college but nit's are better so go with them and also ece and related branches are not too much disconnected with cse so that will not create any problem