I have Bryce 5.5 and Vue Infinite.  And Vue wins hands down, no contest.
Bryce borders on being a toy, Vue is a professional application
that is even used by movie production companies.
Plus if you have Poser Vue lets you import Poser files directly.
With Bryce you have to go through DAZ Studio to import Poser
files into Bryce.
If you have the money, definitely go with Vue.