Ron -- I have a lot of regard for you personally, and appreciate the head-on dealing with problems that you have demonstrated. I'm really sorry to see you in the apologist position for a decision that was made long before your arrival at SOG.
Looking at the charts, there indeed is very little difference between 440A and AUS6. Again, with hindsight, I don't think it would have been all that difficult to explain to customers how similar the two steels really were.
One thing tends to make me question what you've been told by your superiors -- ATS34. For a long time, 440C was the custom maker's SS. Then 154CM came along and people switched to that, presumably for the hardness achievable with the molybdenum in the steel. But then, the price on the 154CM rose, and the steel became very dirty. So, "everybody" switched to ATS34. A good number of production knives were being made with ATS34 blades at the time in question. Yeah, they may not have been the typical SOG customer, but an awful lot of people had no trouble understanding that the Japanese ATS34 was just about the same as 154CM. I'm pretty sure that Buck was using ATS34 on one of it's relatively inexpensive knife. (Sorry, but can't think of the name of it now.) I've never heard anything about it, but what if AUS6 had a reputation for being less pure than 440A? WOuld SOG still have told its customers it was using 440A?
The potential differences between 440C and AUS8A were more significant, particularly in the area of corrosion resistance. There is a potential 5% swing in the amount of chromium in the mix. I would be willing to wager that there have been an awful lot more threads and posts on these forums complaining about the rusting of AUS8 and AUS8A than for 440C. I know I've read a good # of the former, but don't recall as single one about 440C rusting. If there are any, it cetainly would be no surprise if the complaints were about SOG knives.
That was a risk that SOG took when they made their decision to call their AUS8 knives 440C. They took the risk that a lot of their customers would be unhappy with AUS8A and thinking it was 440C, choose not to buy competitors' knives that used that steel. From my perspective, I think the decision makers at SOG did decide to deceive their customers about their knives that had AUS8A blades.
Also speaking from my perspective, I have 2 knives that have AUS8 steel for the blade. One has the only stainless steel blade I own that has presented serious corrosion problems. The other is brand new, and made by a different company. All but a couple of my knives are SS. I know that I have been leary about buying any more AUS8 because of that corrosion problem. If my knife had been made by SOG, and I had been unhappy with and badmouthing 440C, and now learned that it wasn't that steel at all, but a different one, I know I'd never buy another SOG knife. I know that this revelation will have a bearing on any possible decisions about buying a SOG knife.