"This could easily be done in Bryce" sounds like a challenge to me, i say go then, put your money where your mouth is. It is not possible to get a sky like that in Bryce, its just not!
Even the most fantastic Bryce skies with excellently lit and rendered volumetric clouds pale against a Vue sky, and if you look at a Vue sky made by someone who really knows what they´re doing, its just jaw dropping.
That said i TOTALLY love Bryce!!!