Yeah maybe someone will compare - personally, I’ve only got the 4XX and the 400is to compare…
BTW, I’m really taken surprised. This guy has a showdown and soundtest of six 4X0/5X0 series cans here: Hifiman Headphones Compared | Which do you like best? Sound demos - YouTube.
Watch the video and check the sound comparisons. I’m very very surprised here. Don’t wanna spoil the outcome yet but - check the comparison of the 6SE with the 4X0 line. See what you can make out of the sound comparisons, then we talk…