Thanks Roy, nicely put. Joseph's position seems clear doesn't it. I've no reason to doubt his informed assertion that the early AUS books were produced first. But that was 1990, and only a handful of the books of that time have any real value. And by value, I don't necessarily mean monetary. Now the pence copies.... if we could prove the early 60's books were printed first, that would include pretty much all the Marvel keys.
Like you say, pence books are that much scarcer and to me are things of beauty. As a comic collector, lover, enthusiast, I can't get my head around why people would dismiss them. They're so exciting! The natural collecting progression for the collector who has everything (in cents). Maybe the completist mentality has something to do with it.
I like the linkages too, which I find fascinating. Pence copies are almost certainly the reason US price font variants exist. They are part of the history of US comic production. And surely we all want more knowledge, don't we?
I think it matters. And not through any bias. If it were proven the other way - cents first - I'd be delighted, just to know, to have it confirmed. Some of these books introduce some of the greatest fictional characters ever created. Some are worth a million. And we dont even know what order they were made!