The major difference between both these field is that IT deals with the application of computing technology to real life processes, while, Computer Science deals with the science that facilitates these applications.
To make it short and simple, Computer Science is the creation of software and hardware by using different programming skills. On the other hand, IT is just the selection of the proper software or hardware for the task.
In vit for example in first year there is a difference of syllabus, cse students have physics and maths while it students have chemistry and maths ( 1 st sem).
Later on cse students focus more on programming whereas IT students focus more on networking.
Other than that there is no major difference .
This year for example 2 students from