Both produce a super which is a black patternless snake.

Bred to a Pastel you get
Pewter (cinny) and the Black Pewter (Black Pastel)

Pewter X Cinny = Silver Bullet
Black Pewter X Black Pastel = Silver Bullet
Black Pewter X Pastel = Silver Streak
Pewter X Pastel = Sterling Pastel

This is a Black Pastel (Gulf Coast reptiles Line)





I tend to prefer Black Pastels, very few Cinnies have appealed to me so far, I really like the ones that Lawrence (xdeus) produced this year.