I haven’t really had much of a chance to play any of these. My group thought that Savage Worlds stretched things too far! But I will say, since that group basically imploded, I do think that Giuli & I will try some Breaking the Ice. She loves romantic comedies, so that ought to work.
And yes, you could use In a Wicked Age for other genres, which you did. In fact, Dogs in the Vineyard works with other settings, but I also agree that system matters, so I try not to stray too far from the intended genre, usually.