Just used Whims & Fancies today and I know that Shadowy Lady is permanent and the other color doesn't look incredibly unique, but they make a beautiful daytime smokey eye. The taupe treads that fine line between warm and cool, and is just light enough to be an all over lid color without needing to use a lighter inner corner highlight, but it's not so light that it looks frosty and garish. Shadowy Lady melts beautifully into this color, making a beautiful outer V and crease with very little effort, and I am having an easier time using this SL than I ever had with the permanent one.
All in all, I think this duo is brilliant. I mean, I can't even remember the last time I just used TWO eyeshadows for my whole look!