Few points...
Does the best of anything sell with the highest numbers? Does everyone buy the best car? Do you eat at the best restaurant every day? Is Pepsi or Coke better?
The S4 is in the top 5 phones available and the iPhone 5 is not... if it doesn't sell better, wow! That's bad!
Whomever said to compare it to whatever Apple releases this year is right. Or just total Apple phones versus total Samsung phones, of any model, sold during x time period.
If you're a big Android fan, you should want Apple to do well; and vice versa. The fastest way for your platform to get new features is for it to be driven by competition. Unless you own one of the companies, you winning is about the benefit to consumers, not the sales figures.
Sometimes convincing someone to see your point of view is easier if you're respectful and actually trying to understand theirs.