Which is better, IIIT Delhi or NSIT/DTU?

Here is a short review of each of the aforementioned colleges 

• NSUT Delhi: Go for this college only if you are getting CSE, IT, or ECE here. The infrastructure is lacking but the excellent alumni network makes up for it.
• DTU : The infrastructure and alumni network is great but the academic level is average.
• IIIT Delhi: The college is new so does not have an elaborate alumni base but the excellent faculty makes the learning experience great. The curriculum is updated and the infrastructure is modern. The academics are given great focus and the ambiance is pretty rigorous.

Here is what you should prefer for individual branches

If you aren’t getting CSE at IIIT Delhi then consider CSD and CSAM branches of IIIT Delhi but only after considering the CSE of NSUT Delhi and DTU.