I can't answer your specific course questions, but I'm curious to know what kind of job you would like to do after university? I can't think of many careers that would prefer one degree over the other. After all, there isn't a huge difference in terms of the module content. One has a bit more maths - does that matter?
If you can't find any students on here who have the MST124 PDF textbooks and are willing to send it to you, you could always try joining one of the facebook groups and asking there.