<sigh> I have no idea why they really came out with Complete. Animation may be the biggest difference (I'm not sure off hand), but there are many little things that are lacking compared to Infinite. The frustration with this is that with price increase in gen 7, older Infinite users like myself found it hard to justify upgrading to the same level. Paying approximately the same amount as a 5Inf -> 6Inf upgrade would get you only a 6Inf -> 7 Complete "upgrade", but in some ways it's a downgrade; and if you keep this practice up, pretty soon you'll be down to the lowest level. End result, no v.7 purchase for me.
From what I know of E-on's people, the situation leaves me confused. On one had they are creative and innovative; on paper at least, they've had some awesome ideas for Vue. But the full refinement of those ideas seems to fall short. The people I know close to or within the company are really good people, but some of the marketing and production decisions baffle me. I think some of it is desperation - sort of. So short of staff that they have trouble getting on top of bugs. Short of staff and time that they release versions before they ought. Short of funds so the release 27.3 versions of the software (which end up confusing users). The phrase shooting oneself in the foot seems apropos.
Even while I am, with interest, pursuing Terragen, I'd like to see E-on keep Vue going and have it available alongside T2, Bryce, etc, and not just leave the market to the mega programs (with prices to match).