After seeing a bunch of reviews and such (mostly from non-american, non-apple biased sheep) it seems that the APM have slightly better sound quality than the XM4's, however worse bass.
Still not 100% sure on the ANC, but they seem about the same.
So for me, the main benefit of the APM is the seamless connectivity for iOS devices and for audiophiles it would be the slightly better sound quality. However there are just too many downsides (the price, the case, no power off, lightning, weight) for me to pick these over the XM4's or Bose.
But on the plus side, Apple clearly have all the minerals to creating a good audio experience, and for a 1st gen product they seem impressive in certain areas. I would be very interested in a gen2 product thats cheaper and solves some of the issues that are present in this model.