It’s highly illogical to compare DTU or even IIIT Delhi with the top 3 NITs that enjoy the status of Institutes of National Importance. The NITs are second only to the IITs and fall in the same league as old IITs and BITS Pilani. They are way ahead of these Delhi colleges in terms of exposure, placements, and coding culture.
Despite a huge batch size, DTU has limited offers with good packages. While NIT Warangal has a small batch yet a huge number of students getting above 20 LPA.
NIT Surathkal has an excellent record of GSOC Selections while DTU is not even among the top 12 engineering colleges in terms of GSOC selections. Additionally, NIT Surathkal is the first campus that ATTLASIAN visited for placement.
Overall, the top 3 NITs are way superior to DTU and IIIT Delhi in terms of peer groups, academics, research, return on Investment, NIRF Ranking, campus life, and brand value.
Personally, I will recommend you to follow the following preference order
NIT Trichy CSE>NIT Surathkal CSE>NIT Warangal CSE>NIT Surathkal Information Technology (IT)>DTU CSE>IIIT Delhi CSE
As the branch you are getting in all the colleges is CSE, that is same, now there are several other factors which can decide the college you can opt for.
And if you are still confused in choosing or engineering then please do not go for engineering and explore your interest.