I’ve used Inspiration for some time and find it useful for writing whatever – reports, letters etc. I like it a lot and find it an intuitive jump from creating mind maps by hand.
I haven't used MindManager but I particularly like Inspiration’s “rapid fire” feature which allows me to “dump” ideas about the subject (for ex., a report) at hand quickly, spontaneously, non-judgementally, and without the structure that will come later. Essentially it’s a form of electronic storyboarding complete with the digital post-it notes that can be moved around and re-linked in categories or any configurations so desired.
I then hit the outline icon and the diagram is converted to an outline where I can again move the words and sentences around in categories etc. When satisfied I can copy and paste to Word and fill in the final details of the report. I complete written documents at least 50% faster because of the “cognitive distribution” as David Allen puts it.
It makes the dull and uninteresting a lot more fun and helps maintain focus on the task as your creative juices are flowing. For “inspiration” I add pictures from the Inspiration library or even cutting and pasting from Word’s clip art. In the diagram mode I use color and sometimes create graphics to support the work. FYI the current program does have link capability to other Inspiration diagrams if so desired. Did I say it’s fun too? (No, I don't have stock in the company).