I definately think differences should get there own pages. But I think we should look at this differently. Watermarks, security devices seen and unseen, lathwork, engraving varieties…are almost always what we find when a banknote has a different imprint, or place of manufacture.
If numista would use imprints as a reason for a different page, then these concerns of threads, watermarks, etc. Would be moot.
I disagree with less pages for banknotes and false equivalency to coins. Imprints are proprietary and compete with other imprints. So they each have their own master matrix, engraving, security features that are often copyrighted. They should be be treated to their own page by imprint and then none of this other nonsense matters.
Library Media Specialist, columnist, collector, and gardener...