How is the BM course of XLRI Jamshedpur different from management courses present in any of the IIMs?

I seriously doubt that you will have much success in locating a student who has taken both of those classes. It is more prudent to make an effort to get this question answered by members of the faculty that are shared by both institutions. There is a significant amount of faculty exchange between XLRI Jamshedpur and the other IIMs, most notably IIMCal.

XLRI Jamshedpur's BM program interested me. Academic standards are high, in my opinion. It had less access to the world in Jamshedpur. As a result, students participated in fewer international exchange programs, guest lectures, visiting faculty, hands-on chances, and genuine projects, all of which would have likely improved education.