Which among IIIT jabalpur CSE, NIT Jamshedpur ECE, Kurukshetra ECE, NIT Raipur CSE, NIT Hamirpur ECE, NIT Jalandhar CSE colleges is best ?

The choice of the branch is more important than choosing the institute because it determines and shapes your career. If you are interested in working in a PSU or have an interest in Electronics, choose ECE but if you have no such inclinations choose CS, the most diverse field. There are two main differences between IIITs and NITs

• IIITs are relatively new and may not have a very extensive alumni network while NITs are aged old and have an elaborate network.
• NITs provide diverse specialization in various fields while IIITs only focus on Computer Science education. 

Based on the placement scenario and the academics, here is the preference order I would suggest you follow while making your choice

NIT Jalandhar CSE>IIIT Jabalpur CSE>NIT Raipur CSE>NIT Kurukshetra ECE>NIT Hamirpur ECE> NIT Jamshedpur ECE

It's important to note that this preference order is not based on any official data and is based on my own opinion only.