PGDM is Postgraduate Diploma in Management program which is available at each of the colleges that are mentioned above. But if we take into account all of the available specializations, I would say Welingkar is the best as it provides PGDM programs in the areas of Retail Healthcare, Rural Finance, and Human Resource Operations and Operations.
You should consider Welingkar as it has good placements and offers a good course curriculum and after that, you can give IES as your second priority.