It appears you are in the same situation as I am, I wish to return to HK to secure a finance job but is having a hard time trying to decide which school to go to.
I have previously done some research on the financial industry (investment bankers, etc) and I realize that the vast majority of the higher level jobs are secured only by elite school students. Since Rotman is higher ranked than McGill, it make sense for you to attend Rotman.
As for reputation in Asia, I do not believe they would know both Rotman and McGill overly well anyway, if it is Harvard or Ivey then it would be another story (since Ivey has an EMBA school in Asia).
As for education experience I cannot help you with that, since I am still trying to get into a school myself.