I have the QC 35 and QC 45. I prefer the 35 though they are likely harder to find. The 45s have different software and the headphones remind me to pair intermittently when I am not connected to a device, which is annoying because I usually don’t listen to anything, I just want the noise cancelling. The 45s also allow more of certain sounds in, like wind and other things that, in my opinion, should have been canceled out.
Adderall