Good stuff there Jimmy. I think you are correct with the first things I notice is the shape (the toe and throat particularly) of the sheath and the leather used on the one on the left is different than the other two. Also, notice how the stone pouch interferes with the keeper and the wide belt loop on the back side. The wide belt loop doesn't seem to be consistent with these HKL sheaths, but I don't really see it with Johnsons.

The sheath on the left looks like the one that started this debate and the one that is in Gary Clinton's photo (second from left) used by Jack.

In my opinion, there is no discernible difference in price between an HKL or a Johnson BB.