Pagalguy (https://www.pagalguy.com/@wannamailabhi)
IMI ePGDM has shown some good placement trends across the years. However, SOIL has shown a Placement trend of 100% but within 3 months of graduation. With a GMAT score of 600, you should also look for some other good 1 year MBA colleges. Couple of them is Crescent School of Business & Center for Leadership @NCU. Both the colleges were formed by the founding dean of ISB and are backed by good universities and strong industry network.
Eduswami Answer
IMI and KJ Somaiya are established B-schools with a long track record whereas SOIL is relatively new though backed by industry stalwarts. As far as the programmes go, all are standard Executive MBAs with probably a few more extra-curricular thrown in with the relatively new SOIL programme. You should also be aware of the pros and cons of NCR vs Mumbai since both locations offer very different value.