This is not true. You should really look at the specific university I am currently studying in University of Toronto, 4th year student in Eco and Math. I am pretty sure our courses are a lot more harder than courses offered in mainland. For example, our advanced micro-Game theory use the textbook An introduction to game theory by Martin J. Osborne. and advanced macro use the textbook Advanced Macroeconomics (second edition) by David Romer. These two courses are 3rd year undergraduate course.
If anyone has the course handout from CityU or HKSTU msc program, I would like to have a look at them^^