I have the XM4's and the AirPods Max. I very rarely use the AirPods Max. I was gifted them, so I can't sell them unfortunately. For me the Sony's are much better. The kinds of sounds their ANC block (like keyboard clicks), are preferable to me. I much prefer the fuller bass, the weight, and the way they grip my head. The AirPods Max grip unevenly making it feel like the bottoms aren't fully attached. They also give me a terrible headache if I wear them for more than an hour. All in all, a bit of a bummer. If I am in the market for anything else in the next few years I'll definitely be checking out the XM5's.