Hi Clive,
A question I have thought about too for nearly a year. I have 4 Morpheus eyepieces 6.5 9 12.5 and 14 and love em for mono. 18mm Orthos in my WO's has been my fav pair for a few years. I haven't done a direct comparo...memory only...but the M's are much the same as XW's of similiar fl, which I sold about three years ago. The M's are very immersive...like the RKE 28 thing so are one up one the XW's IMO
and they don't stink of rubber either.
Gonna send David a PM seeing as we are both in the astronomical hell of Melbourne, and get the 12.5's together.
Matt