Mine is the 597, so I guess it is not your SB,,,,,,,
Maybe the Sicilian Dark I have is the Bill's Figs variety then.
I also have one just called Sicilian WM, and am assuming it is a dark fig also at this point, not sure who WM is (maybe a source who wants to remain a secret), so along with my Sicilian Blacks, who knows what will be what with what I have. I am going to have to seriously follow up and take pictures of all of these this year and see how similar each is to each other. That will be an interesting project this year.
Thanks for everyone's help so far!