They are both Amphiprion Ocellaris, yes, they will breed.
According to the Sustainable Aquatics Clownfish Chart I have posted on my wall it appears that the Wyoming White color scheme descended from the Snowflake color morph. I would assume that some of the offspring would be splashes of white and orange while others would look more like one parent or the other.
Are you thinking of buying and breeding some of the WW's and Snowflakes that I have for sale or do you already have some?
I don't care how interesting looking a Premnas biaculeatus color morph is, I will never keep one again, even if it was free. Their attitude and behavior is reprehensible.
We ought to sit down and chat. I have some info that could help you.
Aloha,
Mark