IT at IIIT Una is better than CS at KNIT Sultanpur. The reasons for the same are given below.
It is advisable to talk to some of the current as well as recent alumni of both the institutes to know the exact state of the colleges and their placement records. IIIT Una is still very new and evolving. KNIT is also a good option but looking at other things and the future growth potential IIIT Una should be preferred.