Sure there are. Tibet isn’t a global financial and commercial hub with a history deeply rooted in the west.
China hasn’t forgotten the brutal economic sanctions and political isolation it faced in the wake of Tiananmen Square back in ‘89. A similar event in HK would certainly result in sanctions, which a struggling Chinese economy can’t handle.
The contrast between political fallout from an HK crackdown vs Tibet is vast, they aren’t very comparable situations.
China didn't have any issue with being the gorilla in cases like Tibet. So, no real reason why HK would be any different.