Apple controls their hardware, their software, their packaging, the computer-related software (and hardware, in some cases) and, in short, the entire user experience.
Android is a phone operating system. It's a competitor like Windows Mobile is a competitor, which is to say it competes with one of the myriad things the iPhone is doing.
A comparison might make for a good separate article, but when somebody says "I like these features" the response isn't "Well this OS" has it, because the first guy obviously isn't saying "These are the features I absolutely need." They're just things that would make the iPhone even better.
This is why, every time I see an argument over Linux GUIs, I don't insert how much better OSX + iLife is as far as Unix systems go. There's a time and place for comparison, but simply saying "Hay guys Android does this" isn't adding to the conversation.