This entirely depends on your preferences. If you want to pursue a career in human resources after earning your MBA, enroll in the MDI PGP-HRM program.

DMS at IIT Delhi is a general management degree, and while you can choose any electives you want, there are few jobs in HR. If your primary criterion is ROI and you haven't yet decided which specialization to pursue, you should strongly consider accepting the offer from DMS, IIT Delhi. You'll have plenty of time to decide on a specialization anyway. 

In terms of the profiles offered during final placements, there isn't much difference between MDI and DMS, IIT Delhi; however, the overall popularity of MDI is slightly higher than DMS, IIT Delhi; this is also due to the fact that DMS doesn't advertise itself much, and as a private b-school, MDI has that advantage to market itself.