distinguishing black ocellaris and black percula..not the same??

[kaboom]

I need clarification from some expert clownfish owners. A year ago I bought a pair of so called "black perc" and was told that it would develope into a complete black and white fish. The fish is almost two years old now at 2.5" and still has an orange face. The first picture below illustrates how my fish looks.



This one with pitch black face is what I was expecting. Clearly there is a difference and I can only fathom that they are two different species. This is contray to my findings on the internet as it distinguishes them as one fish. Can experienced owners please help clarify?