The problem with Carrara is that they have been promising dynamic cloth in version 6 and never delivered. They just not promise it any more for version 7. Having great dynamic hair (which in my opinion is better than Poser) is pretty useless if no dynamic cloth is available.

To render an outdoor scene Vue is far better. For an indoor shot I would prefer Carrara if they offered dynamic cloth, right now I use Vue for long shots since this provides a consistent quality and Poser for close-up shots where hair and cloth is really important.