This is a difficult and subjective question as both IITs (Indian Institutes of Technology) and NITs (National Institutes of Technology) have their own individual set of strengths and weaknesses. Here are some points which can help you make an informed decision:
Infrastructural Facilities: Generally, IITs have better infrastructure, with better-equipped labs and classrooms. NITs might lack in some of these facilities, but they are catching up.
Teaching Quality: Teaching quality in IITs is considered to be better than that in NITs. IITs still hold the top positions in college rankings and as such, their professors and students are of a very high quality.
Alumni Network: Alumni network is a very important aspect of any college. IITs have a larger and more established network of alumni, which can be of help when looking for job opportunities.
Course Variety: IITs have a more diverse range of courses than NITs, including options for dual degree programs for various engineering branches.
Job Prospects: IITs have better placement figures in comparison to NITs but NITs are also catching up in this regard.
Fee Structure: NITs generally have lower tuition fees compared to IITs and this can be a factor to consider, especially if you are financially constrained.
Ultimately, it is up to you to decide which college to choose, depending on your own priorities. Don't forget to take into account the course of study that you are interested in and the location of the college as well.
For more information, you can refer to these two links:
https://engineering.careers360.com/articles/difference-between-iit-and-nit
https://www.shiksha.com/college/compare/all-iit-vs-all-nit
