Shonner ?

 Ringos example sure doesn't show him applying to the whole body so of
course there is an obvious seam deference.  That was an example of setup not final product. He has a final on Eovia's gallery. 

 I'm not sure the look your after ? My example
is harsh , I did not take a moment to edge blend the lips but that wasnt the question. I could normalize the gradient across the surface by raising my values. 
 That would make the skin more monotone from edge to center. Much less dramatic. simple adjustments in your SSS levels can make it fit the look  that fits you. We all have different concepts of what look makes our own personal style.
 

The original question was how come AS Shanim is getting those gray joints. The
answer is raise the refraction index and translucency to higher numbers. Clearly
there is no seam problem in my render.

Anastasis20 your example tests in your
gallery are super !!  

  Eovia says the algorithms for there SSS are based on the
same mathematics as the high end software. I believe this is accurate. Regardless
if you use a $4000 package or Carrara you can achieve the results your after if
you work with the software . Guys and Gals do it all the time with and without
solid models.

 Here are a few SSS examples of how much control we can get.  The bottle is a solid object , the lights
are the same 3 point in all renders. Note the harsh bottom on the top row right. The RI controls that blending.  you can see as you go through the row and I bump it down we get seamlike effects.The transluceny controls the depth and size of the highlight facing the light source and camera position. If we animate the object the SSS moves on the surface following the light and camera.