What's the real reason Apple can design a higher performance device? Better fab process? ARM ISA is fundamentally faster? Graph conveniently omits AMD who now beat Intel using the same ISA but different process.
Of those two advantages, the process one is a lot more significant. Their chip loses in single-threaded performance to AMD's newest, which are still one node behind Apple, but appears to be more power-efficient. I fully expect that once AMD gets on the matching node they will take the crown back, even in a laptop power envelope.