The sole reason many medical aspirants choose Seth GS for MBBS over GMC Mumbai is the quality of education it offers which places it somewhat higher than GMC.
Grant Medical College is indeed a well-known medical college but not yet at par with KEM at least in terms of academics. KEM welcomes the best student crowd and churns out many great doctors.
Seth GS on the other hand is at the same level as the top medical colleges of India, AIIMS and JIPMER in terms of academics. However, it’s yet to match its level of infrastructure, clinical exposure, and research opportunities.
Grant is known to have very old infrastructure, with issues related to internal politics and corruption. However, most ranking magazines place GMC over Seth GS thereby misleading many.
So always consider all the aspects before choosing your college.