BABA or BABA-SW?

$Alibaba (BABA.US)$ or $BABA-W (09988.HK)$ ? By right it doesnt really matter much becuase th HK listing seems to track the US listing. However, if currency is brought into question, HK lisiting becomes cheaper easier to do dollar averaging with the same amount? maybe less risky of it being delisted? What do you think?