Is DTU better than some IITs?

It depends on which generation of IITs you are comparing DTU with. If you are comparing it with old IITs like IIT Delhi, Madras, Kanpur, Kharagpur, Guwahati, Roorkee, and Bombay, then the answer is no, DTU stands nowhere near them. 

However, comparing DTU to the new IITs like IIT Hyderabad, Indore, Mandi, Jodhpur etc you will find that DTU fairs better in terms of alumni network, and has better placements than new IITs. You can say that DTU roughly lies somewhere between the old and the new IITs. 

Within India, you will find DTU to have a strong brand name because of its rich legacy of being the mother institution of IIT Delhi and NSIT. But internationally, only IITs enjoy recognition and hardly any foreign companies are aware of the DTU brand name.