It's a very good question. Information Technology and computer science are very similar, they both revolve around computers but the major difference is what they do with computers. Computer science is about making software that can be used to do specific functions. Information technology is about maintaining the flow of information in the computers which include server management, Networking, etc.

I hope this answer helps you to choose a good stream for your career.

Feel free to ask for queries. GOOD LUCK!!