Not world wide. They lost that battle a long time ago.
Marketshare.
Also, the Galaxy S3 alone did outsell the iPhone in Q3 of 2012...
Samsung Galaxy S3 is world's best selling smartphone | News | TechRadar
So you are factually incorrect there.
So where did all of Apple's Marketshare go to? I think we can agree Apple trumps everyone else for marketing, right?
Maybe this might explain why it's stock also took a nose dive eh?
Features matter
if all else is equal. In this case it is not. Touchwiz lacks some features stock Android has (like Photosphere) and in the process lags the system down (this becomes obvious in a direct comparison...I have a video if you want to see it). Samsung's additional features come at a price.
This might not matter if Samsung had some killer feature that everyone wants. But the features are gimmicky IMO...I think people are buying the GS3 because of it's hardware (display, camera ect) not Touchwiz. And yeah, I do think SD and battery are part of it as well.