I used your large clean image there to look at the folds of the Aus document and from my eye it appears that the letters are layered atop the folds, rather than being part of the fold as in the Orly doc. interesting to say indeed.
I disagree. For example, if you at the two words "description" and "Description" on the left side of the document, one on top of the other, the letters appear weathered where the fold goes through.