ap3x :
it is the iPhone, It is not like Apple has several different iPhones. They use the last generation for the lower priced option and the newest for the normal priced option. There is no Phone/Tab, or anything like that.
You guys are hilarious, outside of changes to hardware specs and the use of a new version of Android, how different does each Galaxy S1-4 look. At least the iPhone has changed the look of the phone over the last 4 generations.
Both companies make good products but have very different design philosophies. Completely knew industrial designs don't need to be done every year but there are times when the look and feel needs to be refreshed. Apple tends to do this every other year. Samsung has not done it yet. Even the Notes looks like a blown up Galaxy S. They clearly take the "if it ain't broke don't fix is approach."
If you consider stretching the iP4 to create an iP5 a major hardware redesign, that's on you, but looks like everybody tends to disagree. Your own argument (same width, same round button, same volume rocker, etc.) can be equally applied to iPhone.
Even so, if one gets bored with how Samsung phones look and feel, all they have to do is pick one of the other manufacturers that make Android-based phones. OTOH, an iPhone user has only ONE choice, and that choice is minimally different from what he already has.
We are only talking hardware here. On software side, it's even worse. Apple is afraid of losing their vise-grip on their money maker, otherwise if they licensed iOS to other OEM manufacturers one could see wonders being done with it. Just look at the few independent developers that are involved in jailbreaking and can crack the door of the full iOS potential. Imagine what an actual OEM company could do with that.