I have both Vue 5 Infinite & Terragen, right now Terragen doesn't import objects, it has a much better render engine. Vue's renderer is very noisy looking, almost cartoony. Terragen = realism. No one knows when/if TG2 will be released.  Just look at the galleriers of each one to help you deciede, Vue does objects, Vue's plants aren't very good, Terragen is more photo realistic, much better atmo's.