Just a thought for the section on the web site that compares Mori to others. You might use part of Ted Goranson's description (whether as a quoted blurb or not):
"it is the only power outliner with the following: AppleScript, smart folders, clones, internal links, custom metadata columns. No other power outliner has even three of these. Mori is based on Tiger’s new Core Data functionality and has an open source plug-in architecture."
http://www.atpm.com/12.05/atpo.shtml
This way you are not merely providing "something in-between" but adding additional features.