It's like Mac vs IBM PC all over again. Open designs have the advantage in the longterm.
I remember saying this back when the iphone and G1 were out. I got a G1, got laughed at by my tech friends in the bay area at the time for buying a ridiculously ugly phone when they all had iphones.
Ultimately I have always though android wasnt that hard to use, and its much easier now especially if you don't switch brands (normal people who switch between say a motorola and a samsung phone... well all the menus and stuff are in different places because touchwiz etc..... )
ios users have always found everything in roughly the same places because ios has barely changed since it came out other than adding a notification bar.
But the cost factor in the vast majority of countries matters. And in rich countries I think apple is so associated with english speaking that if you look at statistics even in rich non english countries apple has less share (i'm talking say germany, france, korea obviously, japan, vs say the UK, new zealand, australia, canada etc which have relatively higher ios usage given they are all roughly equivalent GDP per capita places)