My bet is on the 5CS. Mind you, the A8/M8 chips will put the 5CS firmly in the market for at least two years. Here's two more arguments in favour of the 5CS: No retooling required: The rear shell of the 5CS (see pictures) is very similar to the 5C. Differentiation: the 4 inch 5CS is smaller than the 4.7 inch iPhone 6. It is a mystery why Apple would abandon this route? Everything is already there.