OH YEAH!! I would definitly say so. First-of-all, the scrolling through different catagories is a pain. You have to push the arrow and it is all weird, in Bryce4 you have a nice, easy to use scroll bar. Bryce4 has many more options for skies and scenes (if that is what you are looking for). If you are thinking about animation, Bryce4 has a little preview to see if you like your animation before you render, whereas in Bryce3D you have to render everything before you can see if you made a mistake. I can go on and on, but the biggest + is the sky options...