What is the difference between PGDBM and MBA?

The one is Diploma and another one is degree, in India both are equivalent. Abroad, MBA is superior degree.

MMS/MBA- MBA or MMS are Master's degree provided by Government Universities and their Affiliated institutes. Some Institutes providing MBA/MMS are (FMS) Faculty of Management Studies- Delhi University, PUMBA - Savitribai Phule Pune University, Jamnalal Baja Institute of Management studies (JBIMS) -