Hello Rishabh Jaiswal. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

I haven't studied in either university, so, I turn to Quora for personal opinions and I give you some of the useful links that may help you in making a decision:

1. For NIST:

• https://www.quora.com/What-is-your-review-of-National-Institute-of-Science-and-Technology
• https://www.shiksha.com/college/national-institute-of-science-and-technology-nist-orissa-brahmapur-20745/reviews

2. For Chitkara University:

• https://www.quora.com/What-is-your-review-of-Chitkara-University
• https://www.shiksha.com/college/chitkara-university-institute-of-engineering-and-technology-chandigarh-52056/reviews

Hope this helps you and all the best!