Hello Jatin, I would suggest you choose CSE  in Thapar university because Thapar has a better reputation than VIT. The fact that Thapar accepts students on the basis of JEE Mains rank makes it a competitive college. You would have a more competitive classroom in Thapar than in VIT. Moreover, Thapar is at a less traveling distance from Delhi so you can easily travel home in festivals and small family functions while VIT is two days away if you travel by train. VIT is better if you have no choice of college. there's always a seat for everyone in VIT.