Sorry if someone already said this, but the Madara that Itachi talked about had EMS, but the Sharingan that Tobi had was the same as Kakashi's. Wouldn't Tobi's Sharingan be EMS if he was the "historical" Madara (as is pictured below)?
http://www.narutocentral.com/manga-viewer/386/8/
Again, sorry, I haven't read teh Madara/Tobi thread.