Skribulous said: The sad part is that they look exactly alike. You can't really tell by appearances alone.
Actually you can tell a difference, Deibus are those fat or semi fat kinda ugly chicks that mistakenly think themselves as gorgeous and are smug as fuck (I had the sad experience of metting way too many of those).
A Dosu Reimu is probably either a Big Measures Big Sis or a H Manga MILF (Aka Massive assets).
Remember that a Deibu will always be an ugly fatass.