That is a very interesting concept. I assumed there were variations in the concentration of either morph but never figured it would be based on the sex of the parent.
The cinamon gene seems to be a strong genetic trait that can dominate other morphs (like spider for example) but possibly, when the sex of parent is different (female), that control over the other morph is weakened and the Enchi gene dominates the combination.
Brians animal definately looks alot more Enchi which the orange tones from the cinny. Sounds like something that should prove itself out if in fact that is the case.
I have a female Enchi that I was going to pair with a black pastel next season. Hopefully i will be able to add to the theory.