P6 is way better than P5, but any program always has a step up from their previous programs. More lighting options which helps on realism and a whole lot more, I am unable to list. Right now I am waiting for the patch. Not able to do anything due to memory issues. So, right now on my system doing nothing. I did happen to finally get a render out last week without memory errors and constant reboots. I have 2GB of DDram.