dito to what agiel said, hard to answer you atm :) but i can say that i do like what ive seen of carrara 4 pro, but once again, which ive said before i dont realy see carrara and vue as competitor, sure they both do some things the other does aswell but i continue to view them as companions (i might be wrong of course since neither is out yet) so as far as i can tell i think using c4 pro and v5 together would be quite nice since they both seems to still be strong @ different things.