IIIT Kancheepuram or Kottayam or Delhi OR NIT Calicut best for ECE?
See if you want to enjoy an urban life with very good placements after you pass out and awesome internships, then IIIT Delhi is the way to go. The only demerit is that fees of IIIT Delhi is very high for a normal middle class person, but if you take an education loan, then paying it off will be very easy as you'll be earning very handsomely after it.
But if you want the same good facilities with less fees, the NIT Calicut is a very good option due to it's reputation in the industry.
You can also use our college predictor to see your chances in all the colleges:
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
Hope I have answered your question. All the best!