SS Gen III versus Lean Six Sigma

A while ago, I had read something about Six Sigma Generation III (some info on the web).  Now, based upon the pitch I read it sounded tremendously like the concept I read in a book I had read in 2003 (Lean Six Sigma by Michael George).  Something about the recent posts made me look at this again. <--- I must enjoy abuse...
My question is simple.  Is there any difference between these two concepts (other than to different consulting groups are championing them)?  Or are they essentially the same product with a slightly different outer wrapper???
Please, no sales pitches.  Just the facts as you know them.