Hi Karan ! IIEST as well as IIST both are one of the best government colleges in India. IIST focuses on b.tech on space technology and space related technologies and it is Thiruvananthapuram Kerala. In the mean time IIEST is in west Bengal and it ranks 23rd in nirf ranking whereas the former rank within 30-36. One can get quality education and placement from these colleges. But IIST admit students through JEE advance but IIEST admit students through JEE main. But yes not every stream is good in IIEST, that is CSE,ECE, electrical, aeronautical are good here. So best of luck to you.

Hello, 

Indian institute of Engineering Science and Technology (IIEST)  and IIST are equally good as per the NIRF rankings. 

Not much difference in rankings but the difference is in courses offered and aims. 

The aim of Indian Institute of Space Science and Technology is to develop the outreach of India in Space Technology and thus the course offers here are based on the same theme. 

That is,  Aerospace Engineering, departmental Maths and Physics etc. 

Whereas IIEST offers all kinds of B. Tech courses that a general engineering institute offers. 

Hope this will help. 

Thanks