Electric blue - Sciaenochromis ahli vs Sciaenochromis fryeri

I have been selling a few of my "Electric Blues" to a LFS for very
little money. I tried another today and he looked at my fish and said
they weren't electric blues. He noticed there were "dots" on the side
of some and said they must be a hybrid with a peacock. He then showed
me his Electric Blue and showed me a reference book with a picture of a
Sciaenochromis fryeri.

Researching the net, mine are definitely Scianochromis ahli - both the
male and the female match pictures on the web exactly. However, how do
I explain the "spots" on some of the juveniles.

Does anyone have any knowledge of Sciaenochromis Ahlis?