Hi Subbu.

Congrats on getting such a good rank. NIT Calicut and NIT Rourkela are both good NITs. But, when coming to NIRF by MHRD, Rourkela is ranked at 15, while Calicut is at 50. With this, one cannot say Rourkela is better. It depends on many other factors. I have heard that the campus life of NIT Rourkela is godd. For NITC, you'll be in Kerala, which is a good state, and something different, if you're from any north indian state. And, also, one thing that you may consider is the distace to these NITs from your home. I see both as good NITs. But, it's better for you to read reviews from the pages of both NITs.

https://engineering.careers360.com/colleges/national-institute-of-technology-rourkela

https://engineering.careers360.com/colleges/national-institute-of-technology-calicut

Good Luck.