They are pretty comfy. I have actually recently heard a coworkers 1am2 and it’s solid. It’s got a more fun sony signature that’s pretty enjoyable, worthwhile if you enjoy something warmer and enjoyable. I can’t think of someone off the top of my head who owns them on here, but I know a few other people have heard it (I’m sure someone owns one tho).
The k371 is more studio tuned (makes sense as the goal of that headphone is for studio), and the 1am2 is more warm and thick sounding, and also smoothed over so nothing is really ever that harsh, while the akg can get harsh depending on the tracks. I think they are similar in detail, but the sonys might be wider from memory, and both had about similar imaging. Both had pretty nice comfort so that was a wash for me