Which engineering institute is better, IIT Delhi or IIIT Bangalore?

IIIT Bangalore is not even close to IIT Delhi in terms of legacy and brand name. 

• IIT Delhi has the best cultural and tech fests that provide tremendous opportunities to explore your area of interest whereas at IIIT Bangalore there is little emphasis on extracurricular activities.
• The alumni base of IIT Delhi is much more elaborate and strong than IIIT Bangalore. 
• IIT Delhi in itself is a brand nationally and globally and attracts the best talents of the country giving you a diverse peer group.
• The average packages of IIIT Bangalore are made up of placements of only 2 branches CSE and ECE which already are highly paid branches. Its average package is misleading. IIT Delhi, on the other hand, has a wide variety of branches so its average package might seem less but in reality, its CS packages are higher than IIIT Bangalore.

There is only one scenario under which I will recommend you not to go for IIT Delhi when you are interested in CS but could get only Textile. In this case, you can always go for an old IIT.

I don’t mean to undermine IIIT Bangalore but it should be your last option.