What a riot!
I'll say on some of the top rigs I've heard for both headphones, they're neck and neck really.
Even out of a J2 the HE-6 doesn't have so much more quantitative bass than the HD800.
Neither is the HD800 so much more resolving. Pick and choose your subtleties.
The HE-500 doesn't even register as being on the same level.
Of course, it's just too cheap to be on the same level.