Based off of that image with all of the endos lined up, I'd say the T-700 is the one that tries to kill john as a torso. Compare the shoulders in those images with those of the t-600, the rounded shoulder joints look far more similar. In that picture, the endo labeled T-700 is smaller than the 600, but with the same pipe-arms and very similar chests and legs. You'd have to really scrutinize to see the difference.
So I just think hot toys, for whatever reason, screwed up the name and/or design. I doubt they'd want to purposely mislead and probably know this now. Who knows, maybe it IS supposed to be a sort of final battle t-800 endo, especially since they have plenty of reasons not to re-release a cheaper t-800 chrome yet and they simply misnamed it.