Interesting discovery by Daniel Eran Dilger:

Bizarrely enough, Apple's Maps in China are better than Apple Maps in Europe or the United States. Those improvements are likely to trickle back to the rest of us in enhancements due for iOS 9 and the next OS X (as well as in the navigation maps on Apple Watch).

I too struggle to navigate Hong Kong with Apple Maps. Looks like it's about to get a whole lot better.