The vague impression I get is that maybe the answer is "Because Apple's software people and chip design people are in the same company, they did a better job of

The vague impression I get is that maybe the answer is "Because Apple's software people and chip design people are in the same company, they did a better job of coordinating to make good tradeoffs in the chip and software design." (I'm getting this from reading between lines on Twitter, so it's not exactly a high confidence guess)