Compare with A4, A8 is a huge difference, of course. However, its difference between A8 and A7 is so...well, we cannot see a huge performance difference between A7 and A8.
Um, this makes me feel frustrating. According to this, which pattern should we better follow when trying to buy Apple iDevices? If they improve performance in odd number A-chip, and improve efficiency in even number A-chip, could I say odd is for processing performance lover while even is for overall performance lover? Processing performance preferable user mainly concentrate on A-chip processing power. Overall performance preferable user will take energy efficiency into account, which means they prefer using less power on doing the same thing.