Together, Not the Same

Recognize that title? It's a popular slogan in Android ads, a not-so-subtle dig at Apple iPhones and their lack of customization and modification. While I'm an Apple guy for the most part, I love the sentiment of the ad. What does "together, not the same" mean? Why should we care? How is it relevant to us?
For those who aren't tech-savvy, the slogan references the differences between Android phones (essentially any smartphone that's not an iPhone) and iPhones. Whereas iPhones all use one operating system (iOS) with very little room for modification, Android phones use a variety of different operating systems with lots of modification options.
Android phones are "together" in their not-Apple-ness, but they're not the same. They can utilize a variety of different operating systems, programs, physical