Well, I posted my swatch of Claire's - Snowball, knowing that it was near the end of its life and that I'd need a replacement white. And so I found Pure Ice - Super Star.
Roses and Cream nails, but it did exactly what I wanted it to do.
I can't really compare it to Snowball, since I keep remembering the ugly thickness of the end of its life instead of when I first got it, but I do think that Super Star is better from what I do remember. It's a very nice white, and I'm glad I have it. :)