Depends on the CPUs. Vue will use quad core CPUs to their fullest, and if you have a dual quad workstation (8 cores) or an Intel i7 based system (4 cores with hyperthreading, presents itself to the OS as 8 cores), those cores will also be used to their fullest.
Also depends on the scene. Large complex scenes will benefit from more RAM, simpler scenes won't. Both Vue and Carrara render much faster than Poser.
Render node licenses in Vue are per IP address, not per CPU or core, so using fewer, higher powered machines may be a good idea.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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