I agree with the above statement as far as render speed - Vue is faster than Bryce (and I've been using Bryce since version 1). Obj conversion is exactly what you have to do in Bryce, but at least in Vue all the maps come in already applied and you don't have to re-apply them. As far as being user-friendly THAT is in the eye of the beholder. I think Bryce's material editor is easier to use myself. The overall interfaces are very similar. They are both fine apps and right now Vue definitely has the edge in speed and animation abilities. It also has the edge in atmospherics - the volumetric skies look gorgeous and render MUCH faster than Bryce volumetric worlds. I now have both apps in my toolbox and I am very happy with that decision.