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Crystal white was the white color in 06 and in 07 they changed it to starfire pearl. Name change, color is the same.
Colors are not the same. Starfire has more pearl in it, lending a darker shade and more colors reflecting in light. In Starfire's darkest state of being, it can be fooled for a "light" Glacier Frost Mica.
I thought GFM looked kinda cool when my g/f was buying her IS so she had a look at it and said "ew, that looks pretty gay to me..." With that said, she bought SP on black and her cousin just picked up a SP on black a couple weeks ago as well. When clean, it's a very nice color.
Personally though, I think SP is too plain for an IS-F.