Right now, I would say the Sulfur and Fire are like the Cinnamon and Black Pastel. I am still holding out hope that the original female Sulfur has some type of hidden gene, based on her look, and other adult Sulfurs. If you go onto EBN's website, and look at their Collection Page, and look at the top right pic under Sulfur, you can see what I am assuming is their adult female Sulfur. The original female Sulfur looks like a Burgundy Hypo, not like that Sulfur. Any way you look at it though, the Sulfur produces some amazing crosses, and I love the White and Yellow Super....
Dave