You need to first decide which area holds your interest- Mechanical or Biotechnology. Do not go solely after the IIT tag. 

NIT Rourkela Mechanical Engineering Department has an excellent faculty. There are a good number of very qualified professors. 

NIT Rourkela is at par with the IITs in terms of quality teaching and other facilities. These facilities include- well-furnished laboratories, research facilities, and on-campus seminars. The department is growing each year and the placements are promising.

These are the 2022 placement highlights for NIT Rourkela:

The Sector-wise placements for NIT Rourkela in the year 2022 are-

Overall, Mechanical Engineering at NIT Rourkela will be a better choice from a placement perspective. The research scope and quality are good at NIT Rourkela. The infrastructure of NIT Rourkela is also impressive. You should go for Biotechnology at IIT Bhubaneswar only if you have a genuine interest in the field.