For most smartphones the number of icons that fit on a home screen is independent from the device type or the operating system on the device.
Different Android-based operating systems come with different UIs, and installing a new home screen UI on any of them is as easy as installing Angry Birds.
I know I shouldn't feed the trolls but let's all be clear iOS still has a large percentage of web traffic, app downloads, and money spent in the app store/in-app purchases and it's lead it actually growing.