Ts kung kaya mo po ang mathematics and software design go as a CS,
If your goal is employment and salary, absolutely CS. IT administrators, except for the very best will typically get service jobs like help desk, or perhaps working with networking on server racks. With cloud computing more and more IT work is being centralized and virtualized, meaning fewer of these jobs will exist.
With a CS degree you can be a software developer anywhere, and the world is hungry for more software. The demand for Software engineers is only going up. Furthermore, Software engineers typically get ρáíd more than IT.