To an extent, you can make an argument for each individually. But they don't mix. After a while, you'd be a walking contradiction. For a fun *exercise, try to imagine the opposite.
I think HK Cantonese is aggressive in much the same way as Boston English is. Speaking HK Cantonese puts me in a whole different persona than speaking Beijing Mandarin. But I'm 1000x more competent in the latter.
To an extent, you can make an argument for each individually. But they don't mix. After a while, you'd be a walking contradiction. For a fun *exercise, try to imagine the opposite.