Choosing between NIT and IET Lucknow will be a tough task. As both have their own qualities and reputation.

• If you are hardworking and sincere enough with good academics then learning new skills will be easier for you. 
• You will gain the knowledge of working in industry through proper training offered by the colleges, be it NIT or IET.
• If you want to choose between the colleges, consider some points. 
• These include Course fees, Facilities, Infrastructure, faculty, alumni network, placements, academics, etc. 
• But yes, if you are getting any decent NIT with a good branch then you should go for it. 
• If a particular branch is not your utmost priority, then you can go for the top NITs. 
• In case you are not getting any good NIT then go for IET Lucknow to pursue Electronics and Instrumentation.

This is a brief information I am able to provide. I hope it helps you in choosing the best college for yourself.