If you have to choose between IT in IIIT Gwalior and Metallury or Biotech in IIT's then also I would recommend you to go for the IIT's because the scope you will get there regarding the placements will be comparably good that of IIIT Gwallior. As most of the placements are open to all, so you can even sit for the IT placements as well. But the most important fact I think is that, you should choose the subject you like. If you are interested in IT then go for it. You will do great. But if you are open to take any fields then go for IIT's.

To know more about IIIT Gwalior visit the link below:

https://www.careers360.com/university/atal-bihari-vajpayee-indian-institute-of-information-technology-and-management-gwalior

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