In iPhone 5S the company Apple Lossless Audio CODEC (ALAC), implemented a chip A7 with a new processor, clocked at the same speed as ecl implemented in iPhone 5 or iPhone 5C. We are talking about a speed of 1.3 GHz dynamically controlled by the chip, it being reached only in the case of using some applications that need a lot of processing power. If last year Apple Lossless Audio CODEC (ALAC), implemented in iPad 4 with A6X chip with a processor clocked at 1.4 GHz, this year in iPad Air the frequency was kept, even if the processor is different.
Only 100 MHz separates the two processors of Apple's iDevices, but this does not have a serious impact on performance, as I already told you in an article published today. It was normal for Apple not to greatly increase the speed at which the processor is clocked iPad Air, it was normal for the performances not to be much different compared to iPhone 5S, but compared to the iPad 4 we are talking about an almost 90% increase in performance.
