VNIT VS MIT
According, to careers 360 VNIT has AAAA rating which means very good and Manipal has AAAA+ rating which means outstanding.
Ratings are based on Placements, Faculty, Cut-offs of national / state level Entrance exams, Accreditation and Reward status and Publication record from Elsevier’s indexing database - Scopus.
In NIRF, VNIT is in 42 position and Manipal is in 43 position.
Both the institutes are good it totally depends on your choice which college you prefer.
Good Luck!!