It depends what you're more interested in really. Computer Science focuses on computers themselves and how they work, and involves topics such as programming. ICT on the other hand is more about the uses and applications of computers, such as the Internet, databases, applications in the home/business/medicine etc. Generally Computer Science is considered more difficult and is more respected than ICT. Also, if you're considering a degree in Computer Science, then Computer Science would be better to take than ICT. However, for something like a Business degree, ICT may be more relevant.