Both the institutes are quite good as per the reviews available. But if you consider the practice sets or the study materials then Resonance have a slightly better study material. Also if you give the all india mock series then in most of the cases both the institutes will give you the same level of competition. So there is not much of a difference. But before joining it would be better for you to talk to some of the students who are studying there as they can say you the ground reality. Sometimes the regional institutes lacks in terms of faculties, infrastructure etc. So it would be better for you to check the ground reality and that you can only get by talking with the students studying in the above mentioned institutes.

I hope this helps. All the very best for your future endeavors!