[Spittie]

My best guess is that the Sunspider benchmark like single-threaded performance, and Cyclone destroys Krait/Cortex here.

As for why, Cyclone's core are bigger, wider compared to Krait/Cortex, and are Out Of Order. (This is a nice article on that: http://www.extremetech.com/computing/179473-apples-a7-cyclon...)