hey dhananjay

first checkout the course structure of both the subjects it and cs in both colleges .it helps you to decide which course is more interesting and worthy . however coming to your question ,its your personal choice but if i had to chose between them then i will prefer CS in jk institute of applied physics . the it branch of nit srinagar is not upto the mark and the placements are nearly same ,but cs branch has a bit advantage over it branch .but there are some advantages in nit srinagar also so list them also

best wishes