Hello Shubham!
First of all it depends on your interest that you want to choose CS or IT.Both are good in B.tech.In difficulty CS is difficult than it because in you have to deal with lot of abstract mathematics and theoretical computer science whereas in IT it is not.Both have much scope in private sector.In many colleges placement is also same for CS and IT.
Hope ita answer your concerns.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile