BOth college are new and backed by two well known brand i.e. IMT & GLIM.You should choose on factors such as placements,faculty,fee,batch size, alumni network and recognization.
GLIM :(It is a 1 year program and requires 2 yrs experience)
Fee : 14,84,000 lac(including hostel,mess and etc)
Placement: Avg 11.14 lac ctc Highest !8 lac ctc
Batch size : 60 seats
IMT Nagpur : (2 years course freshers can also apply)
Fee : 12,10,000 (Including hostel mess and etc)
Placements : Avg 7.5 lac Highest 12.5 lac
Batch Size : 250 to 300 seats
As we consider above statistics I will suggest you to take GLIM Gurgoan PGPM as batch size is small,Return on investment is high.If batch size is too big then it become difficult to place all students on zer placement day.So choose wisely considering above facts.
Hope I cleared your doubt.All the best for future endeavor