Which is best for CS out of NSIT, DTU, and BITS Pilani?

DTU and NSIT have a number of reservation policies like caste, Delhi quota, and numerous sub-quotas, so the quality of the crowd is average. Anyone who gets to choose BITS Pilani instead will never choose DTU and NSIT. BITS Pilani accepts admission solely on the basis of merit and thus the crowd quality is superior to that of DTU. Sparing the locational factor, BITS has an upper hand in every aspect. Moreover, it’s the only institute to enjoy global recognition apart from IITs. 

Specifically talking about CS, the number of Google Summer of Code selections from there is a testament to the credibility of the CS branch here. If you look at the bigger picture and compromise on the location, you will be gaining much more than Delhites.