Here's my short observations of this headphone after using the 1000x for 1,5 years, and comparing it to the B&W PX before deciding which to buy: vs 1000X (Mark I): - outer ear cups made of a more rubbery material which is more resistant to scratches, and band color changed to a more bright gunmetal finish (big pluses) - obviously, the nice app that shows you among other things battery status - slightly lower white noise and possibly better NC performance vs high-note noses (snapping my fingers came in quieter on the M2). - sound: yes, I did an A/B test and there is a quite important difference: the sound is 10-15% louder, the mids are a bit more forward, bass is a tiny bit punchier and highs sparkle a bit more. Basically an overall improvement on the sound, with the exact same signature (and drivers - so it's probably an enhanced AMP). - just as comfortable - ~4h more battery time vs B&W PX: - cheaper ) - B&W has better materials, looks more premium. - Sound: B&W has better sound with NC off (vs 1000X with NC off) - basically a slightly thinner, but more accurate and wide sound - HOWEVER, comparing them both with NC ON - 1000XM2 get an over all sound boost performance vs with NC off, while the B&W PX become quite noticeably more "closed" and compressed with NC ON - in short, PX has the potential of sounding better with NC Off (or wired, used with a high end dac or something) - but for their purpose, BT headsets with NC ON - 1000X sounds noticeably better. - Noise cancelling is pretty much better on the Sonys in all aspects - but the B&W have very little white noise - Comfort: B&W have too much clamping force and i can feel a sore spot on the top of my head starting to form after 10 minutes.