The intro video at http://www.foldingtext.com does a pretty good job of showing what's unique about FoldingText.

The apps you've listed all do "folding". But I don't think they can hoist/focusing a particular section. Or filter the view. Or have modes such as schedule mode. Also general the look/feel is quite different between the apps.

Thanks, I did watch the video but I just don’t see it being any better outright. I’m only in a phone right now so I guess it will have to be a test drive to really see it.