There are no trial versions of PP2014.
Over all, PP2014 renders between 10 to 20% faster then PP2012 for the same scene at the same settings. (a lot depends on the nodes used and the amount of calculations required)

Poser (any version) renders faster with more cores, and it recognises hypertreading. In General preferences, set the number of treads to the number of cores of your CPU.

A quad core = 4 treads
A hyperquadcore = 8 treads
A 6 core = 6 treads.

What you do is up to you. A 6 core will render faster then a 4 core.

The speed difference will depend on what is in the scene, how it is set up, and how economical your render settings are.

Optimising the material room setup and render settings will bring you more speed then any CPU or Poser upgrade can ever bring.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!