The shape is somewhat reminiscent of the Armstrong on my 24' Argosy... but I skimmed their installation guide and didn't find anything about handling condensate, so it probably just drools on the roof.
I'm guessing they have to say "equivalent" because it's a high-efficiency model, so it consumes less for the same cooling. When you look at their specs and even models, it's 13.5k BTUh and 15k BTUh.
Il Carriaggio — 1975 Argosy 24 | Il Progetto — 1976 Argosy 28 Center Bath | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill