There are actually quite a few differences between Android and iOS in terms of interface, and there always have been -- in fact, many features found in later versions of iOS were found first in earlier versions of Android, such as copy & paste, wallpapers, and the upcoming notification area. In addition, applications are presented differently (you have to slide up a panel, generally, or tap a button somewhere to get to them), wallpapers can be dynamic (Live Wallpapers), and Android is, in general, much more reliant on menu structures than iOS, which seems to take a more simple and transparent route to most functions.
Sure, there are similarities -- like the fact that it's a touch interface and applications are represented first as icons -- but I'm inclined to think they're less prevalent than seems to be thought, and the ones that are there are (more or less) common sense. (I could be wrong, of course :))