In MBA, fees is the major concern, as the repayment of the loan taken for the courses is a tough task.
IIM Trichy is far superior to IIM Nagpur in terms of reputation and performance, and everyone will choose Trichy. However, if you are receiving a 100% scholarship, I recommend choosing Nagpur because you won't have to take out a loan to cover your tuition, which will be extremely advantageous for your future job.
You will have a better ROI if you choose college with 100 percent scholarships. Also, IIM Nagpur is the most developing IIM among the new generation IIMs.It has its own permanent campus and better placements records.