2. I wont say Bocconi ESS is more quantitative than SSE MSF......well, i guess the main difference between them is not quantitative or not, but theoretical economics VS practical finance content.
i.e. (assume you plan to work in finance) if you are confident that you are self study those practical finance stuffs, you may prefer ESS.....
3. Bocconi and SSE is around the same level. go for the cheaper one / the subject you like more.
4. CBS is a bit behind the other two.......so this a a tradeoff between reputation and $$. Hard to judge if it worth or not as this depends quite much on personal budget constraint, and confidence/ability in finding a job.
1. no employer gonna look at your IELTS. save your time
2. I think one of the major cost of studying is....the opportunity cost. Don't forget this during comparison
Given that you had a finance bachelor, I think it will be a better idea to go ESS instead of finance again.
just audit a couple of finance at Bocconi if you want some special topic stuffs.