All of these AIIMS are on equal levels with one another. Infrastructure, faculty, and facilities are remarkably similar, so don't undercut any of them. So, excluding these, make your decision based on personal factors.

Remember that it is a common misconception that Raipur is unsafe and least developed. AIIMS Raipur is a wonderful institute that none of you regret attending. They have also achieved some outstanding results in PG. So give it some thought and join any of the institutes you want.