Agree with MarkS--I think these two morphs shouldn't be line-bred to look the same. Black Pastels look fantastic when they are super dark with lots of black, and cinnies work well when they have lighter, richer colors.

However, I want to say that the SHADE of brown in a cinnamon is more important to me than how dark it is. I think the brown of a cinnie should be a darker shade of brown than that of a typical normal.