NIT surathkal ranking for past few years is as follows (Acc. to MHRD) :

2015 - 3

2016 - 2

2017 - 5

2018 - 3

whereas for NIT Rourkela the ranking differ a lot with years.

i.e. NIT Surathkal is far more stable and better than NIT Rourkela.

When better alumni and good placements NIT Surathkal will always be a better institute.