hello aspirant ,

Talking about Amrita School of Engineering and any North -eastern NITs, NITs are far much better options than any of the private engineering Institutes .

So according to my opinion any NIT is much better than any private institutes because NITs haev good Infrastructures , good facilities , good management , activities and far much better placements  than any private institutes . But since you are getting biotechnology in NITs and Mechanical in Amrita school of Engineering , you need to sacrifice mechanical branch if you want to get admission in any NITs .

So all the choices is now in your hand . You can either choose good college or choose good branch.

Good luck ,

I hope that this will help