They are not rebranded version of any current paper. Epson sought out very experienced papermakers and coaters and specified the new papers from the ground up. LuLa's video, due soon will answer your question...
Lots of Canson theory going on about these new Media offerings from Epson, even with Epson insiders that have had early access to these new Legacy papers. Jeff, I'm going to take you at your word here that these new Legacy media are not rebranded offering of media we already use and like, but it's a big stretch
Tweaking something in paper production slightly in order to claim unique product (e.g., calendering of the paper core surface) is not exactly the same as producing a whole new paper/coating formulation from the ground up. Will the enduser, for example, really be able to distinguish clear differences between Epson Legacy Fibre and Canson Rag Photographique?
I'm not judging, I'm just asking
best,
Mark
http://www.aardenburg-imaging.com