Bagginsbill's VSS (Versatile Shader System) is in fact a mechanism for applying shaders to the material zones of figures and objects in Poser via the use of a Python script that interacts with a control prop, which in turn determines what materials are applied and where.
You can use VSS to set up your own control props to apply shaders to multiple material zones of a figure or prop.

The various VSS skin shaders (PR1, PR2, PR3 etc) are examples of that mechanism being used to apply realistic skin shaders to multiple material zones of a figure. Each of these PR (Pre Release) versions is a downloadable prop which has the VSS shader 'rules' for skin already set up so that when the VSS python scrip is run the materials are automatically applied to all the correct material zones on the figure.

I've been using the PR3 shaders for quite a while now and consider them to be the best option for achieving a realistic skin in Poser. They are IMO very easy to adjust for different texture maps and varying surface effects like adding extra shine etc.
How they compare to SkinVue I can't say. Poser has no accurate translucency or SSS shader options so bb has done a great job of achieving the best possible approximation of these effects given the limitation s of Poser at this time.

Since I don't know Vue well enough I can't say whether the VSS skin shaders would be of any use in Vue (can Vue use Poser shaders?), or if there are already more realistic skin options for use in Vue that utilise effects that Poser can't currently reproduce.

You can read more about VSS here sites.google.com/site/poserbagginsbill/vsshomepage

 

PoserPro2014(Sr4), Win7 x64, display units set to inches.

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