There is nothing like that which course is tough it all depends on you.

A student pursuing MBA will be studying more of the theoretical aspects of management. An MBA institute will be following a fixed curriculum as it will be based on the university guidelines.

A student pursuing a PGDM course will be gaining knowledge regarding building soft skills and the programme is more industry-oriented. An autonomous institute does not have to follow university standards, so it is free to change its curriculum according to industry standards and change in the business environment. The course will prepare you for a senior level position in a company.

Good Luck!!