I'm just not so sure that there will be many differentiating elements. Remember that Porsche said it would be evolutionary and not revolutionary. In Porsche speak that means: "Our designers are having an extended tea break and refuse to design any other elements besides the rear-lights and if we ask them really nicely , they will concede to drilling a few holes in the rear. In order to differentiate this car from a ordinary face lift , they have also conceded to making this car flatter and wider".