black pastel. <- edited answer =p
I personally think the best looking cinny is different than the best looking black pastel.. granted, they make similar looking combos, i think the good black pastels will have a darker look.. cinnys are a sweet looking BROWN.. like cinnamon lol... black pastels should be jet... hence the names.. doesn't matter if they make the same combos.. call them different LINES bred for different qualities instead of different morphs if you must.
I think cinnys have to have nice black backs, high gold/brown coloration, and nice floating alien heads.
I think black pastels should have squiggly lines within the alien head pattern. I also think the alien heads shouldn't be floating.. and it should be a much darker brown - less gold colored snake. I also like the black pastels with the gold striping on their backs that really bring out the rich blacks.
my 2 cents