When I was deciding wether to get a vari x II or III, I contacted leupold to ask what the difference was. The gentleman told me that the only difference was in lense coatings, the mechanical structure was basically the same. That was 10 years ago. If that is indeed the case then it is my guess that vari x IIIs likely only have one erector spring, as that is what the vari x II has. It could be different in the newer scopes however.
