I don't have either of those, I have a wh-1000xm2. I just wanted you to know that my xm2 is used a lot at work and never had any problems with it, I fold it up each evening to take it home, and no issues with the hinges, and the sound is same as when I bought it.

I'm interested in hearing people's take on the XM4s in regards to comfort and sound leakage from using them with glasses

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