You have 10yrs of long experience if you are opting for MBA it will definitely help you to grow faster in your career thats for sure, because companies in today's date look for experienced people with good profile and which are up to date with the new technologies.PGDM from NMIMS wil be best because it has a name tag though both have good reputation, but NMIMS have few grades up than wellingkar. You will not find any difficulty in job after completion whether you do from wellingkar or from NMIMS because your profile is already build plus you will be adding PGDM completion with it. To grow one have to accept risks.