I learnt on bryce and I have no problems with the interface because its what I am used to. I have Vue6 I but I still keep going back to Bryce because I find it easier to use. I love the Bryce trees but I always have problems with the terrains and I don't with Bryce. 
but lets be honest its not the software that makes the artist and I think some of the Bryce art is unbeatable :)