Correction, the A7 chip is faster because it has a superior architecture. There are many aspects of the processor that determine performance. Clock cycles and # of cores can't be compared across different architectures. You can take my word for that if you haven't done your homework. You can't compare the mAh of batteries either in different systems. If one battery has double the capacity of the other, it doesn't mean it'll get double the battery life if powering a completely different system.