maybe for postgraduate entry roles, u might also consider london business school MBA also for this. For roles requiring in depth quantitative knowledge where u might be questioned on this in interview i would think CASS can place u in a better position knowledge wise. CASS financial research is...
i'm not sure, LSE has good kudos, CASS is very focused on knowledge required by quantitative practitioner. you will be able to price most exotic options on completion of CASS course. this can help with employment. guys who go CASS mostly seem to work in options risk or trading.
i did cass course mathematical finance + trading
its very good stochastic math course with trading focus
i got a lot of work in banks following this, there are a lot of cass post graduates working in city + they know the course standard is high. hard work.