An MSc and a Masters of CS are slightly different. Basically a Masters of CS is a masters lite. 2/3 the coursework with no thesis. Its a whole different bag.
I'm doing a masters in applied math, and not having to do a thesis would sorta ruin the whole super independent part of it. I'm looking forward to doing cool research that I want to do. It will probably suck towards the end when I'm finishing the details of my thesis, but right now its exciting to dream of things to research.
Sounds like earning the degree now may shorten the program's duration.