[tomkinstinch]

The Apple Store sells both and will let you compare the two models if you ask nicely (with new/clean AirPods). I found AirPods have noticeably better noise cancellation (for me) than the QC35s, but YMMV. Subtle but better. It's hard to say if my impression was due to better passive noise isolation or improved active noise cancellation (does the QC35 have an error-correction microphone downstream?). One thing that is absolutely true is that the QC35s do not work as well mechanically for those of us who wear eyeglasses: the cushions can't seal around the temple pieces of the frames, so some sound will always leak under the eyeglasses. For that reason alone—even if the AirPods have equivalent noise cancellation tech—the AirPods can work better for people with glasses as long as the tips seal properly. My wife, an eyeglass wearer with long hair, also found the AirPods more effective at reducing noise when we tried them both at the Apple Store. I certainly find them effective for commuter rail travel.

As an aside, one slightly annoying usability issue with the AirPods is that in comparison to the QC35 they behave differently when part of a multi-output audio device under MacOS. My wife and I often watch video using two pairs of bluetooth headphones paired and synced to the same Macbook Pro[1,2]. It's great for late-night movies in city apartments. Using the QC35s and her headphones, the aggregate device remains selected when the QC35s are paused or turned off (meaning, she can still listen if I go out of range or turn off my headphones). With the AirPods, if I take one out of my ear (to scratch an itch, say), the AirPods suddenly become the only audio output device when I put it back in, and the second pair of headphones goes silent. A small annoyance, but curious.

1. Set up your own bluetooth audio "splitter" to allow multiple people to listen togther: https://support.apple.com/guide/audio-midi-setup/play-audio-...

2. https://support.apple.com/en-us/HT202000