They are different mutations. However, they are allelic, which is why they are so similar. The supers are different. But both are compatible to make a homozygous form.
If you keep looking at examples, you will learn the differences.
In my personal opinion, I think quality examples look totally different.
They have different colors and patterns.
One of the main black pastel traits are the squiggles in their alien head pattern.
Cinnies are more reddish brown in hue.
Black Pastel:
Cinnamon:
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