Well, the first N specific things that come to mind have already been expressed pretty well by previous comments here (including your own "snappier"). The next 10*N things are already expressed pretty well in the 2009-format-but-still-valid-content marketroid material on lugaru.com. As it happens, I haven't found a need to explore a universe of community extensions because right out of the "box" Epsilon does nearly everything I need, and my few personal extensions take care of the rest. Beyond that, I no longer care to engage in yet another emacs religious war, and emacs does not need any bad-mouthing from me.
I can understand and respect that you're reluctant to write an endorsement of Epsilon and/or a comparison with Emacs. But I'd like to let you know that while starting to read your comment I was looking forward to just that, and now find myself a bit disappointed that you're not sharing some reasons for your enthusiasm.
I was a big fan of Epsilon back in the days when it was an alternative to WordStar and I think I still own an original (paid) copy on floppy disks, but I'm not familiar enough (any more) with its feature set to meaningfully answer the question of what qualifies it above Emacs.
Personally, I'm considering paying $250 just for the nostalgia value. And I love fast editors with an uncluttered surface. The ability to edit arbitrarily long lines and binaries is certainly a plus. But I would appreciate, if you'd reconsider, hearing more arguments to knock me off the fence.
The demo for me just felt like a snappier Emacs clone.