Well, I'm not sure what is meant by "Vue will use quad core CPUs to their fullest", but Carrara maxes out all four of my quad cores when rendering.  You can see each core listed with a differenc color on screen as they work sequentially on individual segments of the render.

Klebnor

Lotus 123 ~ S-Render ~ OS/2 WARP ~ IBM 8088 / 4.77 Mhz ~ Hercules Ultima graphics, Hitachi 10 MB HDD, 64K RAM, 12 in diagonal CRT Monitor (16 colors / 60 Hz refresh rate), 240 Watt PS, Dual 1.44 MB Floppies, 2 button mouse input device.  Beige horizontal case.  I don't display my unit.