Computing and Computer Science are NOT the same thing. Computer Science deals with very low-level stuff; the principles of hardware and software, low-level programming, the mathematical underpinnings of computer systems etc. Computing, on the other hand, is somewhat more vocational, dealing with the skills necessary to have a career in the IT industry (programming, systems development, networking, administration etc.). They're both very interesting courses, it's just that CompSci is unsurprisingly much more sciencey.