What should I pursue among MBA and PGDM? Which are the top colleges to pursue the same?

Both are same. but syllabus of PGDM is a little modern. you can pursue MBA or PGDM whatever college is providing. Link for top colleges is given below:- https://www.shiksha.com/mba/ranking/top-mba-colleges-india/2-2-0-0-0

Both are equivalent and PGDM has nowadays modern syllabus and learning facility. All the IIMs , FMS Delhi, IMI delhi, IMT ghaziabad, Spjain, MICA, IIFT, Jbims, ISB, Xlri, Kj Somaiaya, Sydenham are top tier coll.