One of my friends was in a similar dilemma last year when she had to choose between ECE at IGDTUW and NIT Delhi. She eventually chose NIT Delhi, Electrical, and Electronics branch, and has no regrets to date.
Sharing her experience she told me that since NIT Delhi operates from a temporary campus, it takes around 1 hour to reach college from the hostel. The Infrastructure isn’t very good but if you want the NIT tag, then NIT Delhi isn’t a bad choice.
Moreover, IGDTUW is an all-girls college while NIT Delhi is co-ed. So make your choice after looking at all the aspects.