Also, multiple device support and call quality I'd say is better on the bose. I'm not a bose fan boy, I'd actually prefer the Sony for noise cancellation and a wider sounds rage, but the poor build quality and crap customer service is a deal breaker for me.
Lots of problems with the Sony xm2 and 3 headbands cracking. Not sure if the xm4s have finally sorted this. My other half had the xm2s and they cracked after a year and sony wants to charge £90 to repair. I'm sorry, but I'm not going to buy sony anymore if they ignore poor design and manufacturing defects. Bought the bose and the sound is great. No problems with the app or quality.
Great sound and noice cancelation, but let down by a terrible app that is required to setup the headphone. Serioues issues with multi device support, returned mine after a few weeks and wont bother to buy Bose again
Got them thanks. I have B&W PX but one of the buttons no longer works and they quoted me £120 for a repair.
Sony XM4s are £237 on amazon at the moment.