The answer is very subjective and it would vary depending on the college’s you’re comparing against each other.
Suppose, if you’re comparing with an IIM Among the BLACKIS there are few private colleges which are comparable or better than these IIM’s but if you’re comparing these private colleges with the new or baby iims then the list would be longer.
Some Private colleges which are comparable or better than the IIM’s
Comparable to Old IIM’s:
XLRI, SPJIMR, MDI Gurgaon, TISS Mumbai (HR), JBIMS Mumbai
Better than New and Baby IIM’s:
NMIMS Mumbai, IMT Ghaziabad, XIMB, SIBM & SCMHRD Pune, MICA