His detailed impressions are here: https://www.reddit.com/r/headphones/comments/xm31cr/impressions_he1000se_arya_se_ananda_edition_xs/
It's actually insane how many times Adorama has lowered their price.
From $699 ~1year ago, to $449 now.
Best value in audio
, and my personal endgame (I listen to electronic music 99,99% of my time, so keep that in mind), only buying a HE-6 OG for its infamous bass slam, but I'm in no rush.
Today I compared an open grill HE6seV2 (still waiting for a HE6seV2 with DCA Ether Angled Earpads, that is gonna be mine) to Arya SE and HEKV2 and:
Soundstage: HEKV2 >> Arya SE > HE6seV2
Resolution: HEKV2 > Arya SE >= HE6seV2
Bass slam: HE6seV2 > HEKV2 > Arya SE
Rumble: HEKV2 > Arya SE > HE6seV2
Treble (less harsh): HE6seV2 > HEKV2 > Arya SE
For EDM, I prefer the kick drum more at the level of my eyes than floating my forehead.
Arya SE and HEKV2 are too airy for me.
HE6seV2 provides a holografic soundstage with just enough length of each axis.
Resolution is more effortless on HEKV2 and, to a lesser extent, Arya SE, I think mostly because of their airy presentation, with elevated treble.
HE6seV2 has similar level of details, without being fatiguing.
Even though HE6seV2 doesn't rumble like the others, I think they have sufficient feel of it.
Bass slam is hard to define.
For me it's just the way the bassline comes and goes away, with an apparent extension of it, like it gets more physical.
HE6seV2, properly amped, has plenty of slam, with HEKV2 having less but more rumble, and Arya SE having more rumble than slam.
Treble seems well extended on all of them, although HEKV2 has the upper hand when it comes to details.
For me though, I prefer a detailed albeit slightly smoother presentation.