hey, the scholarship depends on the cost of your living there, because the cost varies in different location. So the remaining is almost the same for different schools. My suggession is you need to check the research ranking of them to choose schools.
If I were you, I would choose City U and asked Kwok Leung to be my supervisor later. Kevin Au and Jessica Kwok were under supervision of Kwok Leung and they were now associate professors and got many research awards at CUHK.