Hello Aspirant

IIT Madras is ranked 1 in NIRF ranking, but all toppers of JEE Advanced goes to IIT Bombay for CSE. This is because of various factors:

• IIT Bombay is situated in the Economical capital of India making it a perfect place for companies for work. Also, students get the exposure of real life world, which is somewhat missing in IIT Madras.
• Top Companies like Google, Microsoft, Amazon coming to IITB is also one of the reasons.
• Also, new technology is introduced in IITB, for example in the tech fest of IITB the World's first humanoid Sofia is displayed.
• Also, NIRF ranking doesn't depend upon locality of college, but students while taking admissions prefer locality of the college.

Hope this helps and all the best.

Dear student

Yes, you are right IIT Madras is nirf no.1, but there are many factors which make  IIT Bombay the more craved one. IIT Bombay has a very good reputation for it's faculties and other facilities. It's placements are quite good and it is visited by top notch companies for all branches especially cse. T The prestigious list of companies include Google,HCL, Facebook, Microsoft, Amazon and many more. It has made it's reputation as the best among IITs.

Hope it helps