Both handle enviroment generation very well. There are pros and cons to each. Most 3D software has similar User Interface controls, yet the there are different levels of controlability(is that a word?). I guess it's all a matter of what you like. I know what I like and don't like in each of them. You can try out both, each has it's trial version, you may also want to explore the results of each in the galleries. Overall do all the tire kicking you can, I bought both and I use Bryce 99% of the time. Good luck