I have made a few minor adjustments (thank God for Photoshop!) to the one on the right, mostly in the forelimb department. I'd failed to notice when I made the original sketch is that the "elbows" of the forelimbs stick out at least as far as the "knees" of the next pair of legs. This seems to hold true for all of the tiny sample of Lucanid species I've examined so far.
The specimen on the left is also missing a name. It was sold merely as a "Chinese Stag Beetle". I was struck by the obvious similarities in colour pattern, pronotum shape and head shape. It seems quite likely that these may be a male and female of the same species.