The most important thing you should know is which course will prove to be better for your career, rather than which is the best overall. As some of my friends are from NITIE Mumbai, I can give you a bit of information about PGDIE and PGDIM.

• Both PGDIE and PGDIM are flagship courses of NITIE.
• PGDIM is considered to be a management course, whereas PGDIE is a technical course.
• PGDIE is a more M.Tech equivalent.
• There are also certain differences between the course curriculum at PGDIE and PGDIM.
• PGDIE has a batch size of 120. And PGDIM has a batch size of 250.
• Admissions for PGDIE are done through GATE scores. For PGDIM, CAT scores are considered.
• The placements of both the courses are good. Students of both these courses sit for placements by almost the same companies.

Therefore, it is suggested that you opt for the one that suits you the best. Ask yourself where your passion lies and will a management course or a technical course be beneficial for you.