I completed my B.Tech ECE from NIT Durgapur a few years back. Thus, I can tell you about the ECE department of my college-
The placements for ECE are quite poor. Barely any core companies visit the campus for recruitments. As a result, ECE students try for IT companies during the placement season. The curriculum is also not up to the mark. It needs to be updated and aligned with present day needs of the semiconductor industry. Scoring good CGPAs is easy but one has to stay updated on the industry standards on our own.
IIIT Allahabad has a research oriented environment, and its attendance policy is quite lenient. It offers good placements in the IT department. Try to approach some seniors from IIITA to find out the condition of its ECE branch.
If the B.Tech ECE at IIIT Allahabad is as good as its B.Tech IT, consider joining this college over NIT Durgapur.