What should I choose between IIM Kozhikode and NITIE considering placements (acads: 88/77/64, 22 months exp in IT)?

Your question raises serious concerns among many other aspirants too, thus before deciding which institute you should go for, here are certain points you might want to take into account. 

1. Faculty: Your field of study will highly depend on the faculty’s contribution. It is required that you understand their insights, research works, and other essential components before deciding which institute comes with the better one. 
2. Course Curriculum: It is known that every B-school will technically follow the same base for curriculum, with fewer or more additions to the subject course. You should understand the differences between the curriculums both institutes have, and decide upon it only later on.
3. Alumni: An institute is expected to come with better brand value and placement offers based on whether or not they have a good alumni base. Any institute that has more batches in the best positions will supposedly perform well.
4. Location: You should always go for convenient choices. For instance, a B-school situated in Mumbai will be able to have more placement offers, opportunities, and guest lectures as opposed to the institutes located elsewhere at the different corners of the country, like North East.
5. Placement: You should understand the placement reports, and on the basis of them, you must look for firms or roles that best fit you. Alongside these reports, you should consider discussing the prospects with students of the same institute.

Here is a placement report of both institutes,

NITIE, in case, can be a better choice in terms of pursuing Operations. The institute often sees a spiked range of visiting companies for roles based on Operations. On the other hand, IIM Kozhikode can provide better placement offers, brand value, and course curriculum.