Which is better for CSE, IIT Bombay or IIT Kharagpur?

The quality of Education, the faculty pool, and even the lab facilities offered at both IITs are similar. There might be slight differences as far as internships are concerned because the top companies with coding profiles visit both IITs but the interview process is quite different. 

The main reason for this difference is the location of both institutes. In the case of IIT Kharagpur, recruiters prefer taking a skype interview than personally visiting the campus because of the isolated location of the institute. This plays against the favor of IIT Kharagpur as face-to-face interviews are way better than online interviews. Online interviews do not convey the information and expressions rightly and there is a communication gap.

Companies tend to judge IITs based on rankings which depend on their respective placements. For instance, the same profile and role are offered with a higher package at IIT Kharagpur but with a lower package at other IITs.

While IIT KGP CSE has a wide scope if you have achieved a top JEE Rank and have managed to get into IIT Bombay, go for it.