Neowin: "Microsoft and Google’s strategies are quite similar in the mobile space. They each have a mobile OS, third party hardware vendors (excluding the Moto-Google deal), and have to wait for carriers to provide the updates to their hardware. But where these two differ is on their OS strategy: While Microsoft has a walled garden approach to its OS, Google is more liberal with its platform.
When you look at Google, they literally have dozens of different devices and different platforms out on the market. For Google, updating their devices is not as easy because of numerous manufactures and various versions of the OS."