John, there never was a ZE 25mm. There was a 25mm in Nikon mount (ZF) and Pentax mount (ZK), because those product lines were released before the Canon-mount ones. By the time Zeiss started releasing ZE lenses, they felt that the 25 ought to be redesigned, and all 25s were discontinued, pending a full redesign. Then; for some unexplained reason, they reintroduced the 25 in Nikon mount in the same version as before, still pending the redesign. This should appear fairly soon now, if rumours are to be believed.
Hope this helps