Digital BW, The Print

Can some-one shed a light on the current situation wrt Epson Enhanced and Archival Matte? 

As fas as I know, there was originally a paper called Archival Matte that turned out not to be of archival quality at all. Consequently, this paper was renamed to Enhanced Matte. For some time the paper remained to be sold under both names. In my perception, the name Archival Matte slowly dissappeared. 

But now it seems to me that it has resurrected. On some places I see Enhanced and Archival Matte (still? again?) offered side by side. Are these different papers now and is the Archival really archival? Or are they still the same? Or am I mistaken altogether?

Joost