Actually, I can't find them but using Poser11, it's Cycles V1.x, whereas with Poser12: it's based on Cycles V2.x. And it's ture that the shine effect (not sure that's the right term to use) is more important

Using Poser12, this parameter must be lowered. That are a number of Cycles Nodes that have been updated and corrected because the calculations were wrong with Poser12. Supposedly it could be the same with the bump and displacement maps, even on a PoserSurface node.
Have you tried to use the PhysicalSurface node, to see if you can find a decent look on both Poser?

I can't imagine the difficulty for a vendor...

𝒫𝒽𝓎𝓁

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