Here's just another thought, (and the reason I chose Vue over Carrara). Check out the renderings in the respective galleries...not just average renderings, but the best ones. Great renderings inspire me. Especially check out some of these:

erka
czarnyrobert
thomaskrahn
garyandcatherine
sacada

When you see some of those renderings, you know what the software is capable of. I've yet to see the equivalent in Carrara. Now, I know Vue is only a tool, and any tool in the right hands yada yada, but the tool does affect the outcome. If I only have a hammer and wood, I build my house differently from someone who has metal and a torch.