Having looked at a ton of adds and more pictures I think they're the same, just like all the "yellow" pastels. I saw BHB has a Lori Ball Python for sale which looks like a light colored cinnamon, kind of how Dave looks now.

Found a dealer who had both cinnamons and a black pastel for sale and they looked the same to me.

I took a really close look at my cinnamon female and while she doesn't have highly noticable squiggles, she does have darker scales around the alienheads that once she fades will probably look like Daves.

I wonder which line of black pastels has the high yellow content? They're the only ones that really seem different.