Maybe in the beginning they would start to sell 5C in few markets, but at the end it will become a worldwide phone, that's logic.The guts of the 5C, aside from the larger screen, will be more like the 4S than the 5.
One thing I noticed is the bottom of the 5C the speaker / microphone looks different than it does on the 5. Not sure what's going on there.
There has been a fair amount of talk that the 5C is being make for markets like China. Is there any guarantee they're going to sell it in the US? I'd probably bet a few dollars they will but what if the C in 5c is for China and it's only for that market?
Actual 5 owners are not intended to upgrade to 5C, the new iPhone needs to acquire new customers or who wants to upgrade from 4 family. And they aren't few...