The Apple Watch also has the advantage in mobile payments through its support for Apple Pay, which is already gaining traction among iPhone users. Google has its own mobile wallet service, but hasn't announced Android Wear support, and no current watches have the necessary NFC capabilities built-in.
But despite all these differences, the Apple Watch and Android Wear don't seem fundamentally different. They both, in essence, try to save us the trouble of using our phones by delivering quick bursts of information, and acting as collectors of data (fitness data in particular) to help us live richer lives. In doing so, they ensure that the Apple-Google rivalry will be just as fierce on wearables as it has been on smartphones.
Sign up for CIO Asia eNewsletters.