Well mate I own both so I am in a good position to compare them. I used to use Bryce a lot but now I almost always use Vue.Vue's layout is better,its faster to use by a long long way. The renderer is faster, The atmospherics are far better. The material editor is easier to use and understand. The vegetation looks better although is more limited in my opinion than the Bryce tree lab, although Bryce only does trees and Vue does a range of plants also. The sun looks real Bryce's does not. One thing that I think Bryce does better is erode terrains. Vue can tend towards the dreaded Jellymould effect if you are not carefull.A bit of practice eliminates this though.Bryce seems to produce slightly better water in my opinion but this is a minor gripe....as you can tell Vue is the one I use and Bryce is gathering dust