Ahh I always thought that they were as there are some major differences in face shape,body and of course unusual colours.
I myself have a Red Spotted,Gold and a Rotkeil,the Gold and Red Spotted are together all of the time,despite owning the gold and Rotkeil long before i owned the RS.
Also when my stepfather bought a common green and a gold from one of my LFS's he put them into my tank because he lives miles away and was staying at mine...
His green and gold were both about 2" and my Adult Gold 9" and I had a green at the time myself at 4"...all of these would be side by side all of the time,but the Rotkeil a outcast! lol
So that also got me thinking they were a slightly different species,thanks for clearing that up for me as whenever I have asked that before,I always get told they are simply a colorform of Efasciatus.