It's been discussed before Black Sambo.
Sounds like you're describing what Dub has said many times. He thinks the cladding color on the dark paint colors is a bit lighter than cladding color on the lighter paints.
I do know the part number is the same, and it should be the same.

Since I kind of delved "pretty" (there's an understatement _ ) deep into this when I tried for 2 years to solve why I had the extremely weird VERY LIGHT GRAY cladding, that was NOT dry and parched looking (like many have after being uncared for for a long time.)

I think there are now going to be a variety of hues of cladding for a few reasons.
Since many MANY of us have dyed it with ShowRoom Dye to either dark charcoal or pure BLACK, I think NOW, you might find some of these VXs for sale with darker cladding. Some others have used GatorBack and a few other products.

But even untouched cladding may have variation based on how it was treated and what it was treated with, sun exposure, weather, etc....