Hi Bharath Reddy,

It totally depend on you.

First i will define what do both courses mean

Hi, This is the difference:

PGDM (Post Graduate Diploma in Management) is a diploma degree issued by AICTE (All India Council for Technical Education) recognized institutions in a 2-years full-time program. It is at the par with the quality of education imparted on students pursuing an MBA degree. 

PGPM (Post Graduate Programme in Management) is not a degree but a certification course. It is a typical 1-2 years program, and doesn't possess any sort of recommendation as it is generally offered by colleges without affiliations. 

Difference:

The biggest difference is that PGDM enables you to pursue higher education like Ph.D but a PGPM program doesn't facilitate you the same.

In short, PGDM is a course while PGPM is a certification. If you are looking for job purpose(most do) go for PGDM.