Hi Rohit

Both of these colleges are excellent colleges.

While choosing college keep in mind the following things :

a) Branch - This is the most important aspect since this will stay with you for the rest of your life. Choose the college in which you're getting a better branch or a branch of your choice.

b) Location - It is a really important aspect as well , Delhi being a hub of coaching centres will provide you better opportunities to prepare for competitive exams if you ever prefer to go for higher studies .

c) Alumni network - NSIT Delhi being an older college will give you a better alumni network which is also really important.

Hope this helps