OH - I have an update on my E8 experience. Yesterday evening I was cleaning out my daughter's closet and I was wearing the E8s while I did it, trying to listen detailed and figure out why mine sound so different. Anyway, I found her old 1st-2nd grade earmuffs. They were very tiny and cute. Because I'm that guy, I put them on my head. The earmuffs "mushed" the top of my ears against my head and the bottom part of my ear moved out away from my head as a result. They also pulled my ears back away from my face toward the back of my head. The E8s suddenly sounded much more bassy and full. Took them off, back to the same thinner, more clinical sound. It was amazing and re-creatable each time I fiddled with the earmuffs. I could do it by playing with moving my ears around with my fingers, but when I let go it went back. Unfortunately, spinfits, spiral dots, complys and regular silicones could not recreate the effect.
If you look at the last pic in my post comparing the Senns and E8s physically (
https://www.head-fi.org/threads/goi...re-we-there-yet.861024/page-180#post-14640561), you'll see that the Senns have a more pronounced angle "up" at the tip.
I think that may be the difference. My ears are just shaped wrong.