Hey Deepanshu , 

First of all congratulations on being selected for NSIT . I if you are getting admission in IT branch in NSIT you must not loose this golden chance . As IT is the most valuable branch in NSIT as well as the Industry also. Also IT  department of NSIT is best when you are Opting a college by the JAC counselling . I must say you should take IT from NSIT undoubtedly . Telling about DTU in the recent years there is a lot of increase in no. Of seats which it is making the competition tough day by day for the placements. 

Best of Luck.