I think it depends on what you want to use it for. I had Bryce 4 and 5 and left them, now I only use Vue....I have Vue 4 which I totally adore and I now have Vue Pro and am a little disappointed in Vue Pro. It could be I am not using Vue Pro to it's capacity yet, but I have never had problems with Vue 4....it's totally a stable and a great program. So, it depends on what you want Vue Pro to do for you that Vue 4 can't do. There is a difference between the two, but in my opionion if you are going to use it for static images, I think Vue 4 will totally make you happy. Sharen