You can't really see it but he looks different from normal rapael catfish. That was actually what made me buy him ( I may have already said that...). Instead of having a sharp point for his dorsal fin it's rounded and where normal raphael catfish have smooth straight lines where the colors change his are more blended. God I love this little guy, makes me smile when I see him.
There is room for variance in every species. Especially for coloration. It is a function of great many variables, such as genes, gender, age, mood, and every aspect of the keeping condition.