no both are different, the major difference is the exposure, PSG tech has numerous well established clubs, sports facilities , large convention hall where numerous international conferences and seminars are held periodically, NCC, NSS apart from high tech research labs!

Hostel facilities are also better and it is located in the prime area of city where  everything is availiable at a walkable distance.

compared to this psgim has none of these or at a very nascent stage. Its the exposure  that makes PSG, very attractive. ANybody can teach the same subject  in any college.

But in terms of placements both have same opportunities.