Take it from the editor's mouth: there's no difference. They both came from the same print run, which was maybe 76,000 or so. Of course, about a third or more of that would have been pulped as part of the normal process of how magazines are sold in this country, so the number extant is probably something like 50,000 (which makes it by far the circulation king of the stand-alone Living Greyhawk Journals).

--Erik Mona