Now that I have both my Sprint and International version, I can at least install my Zagg custom skin and my SGP Oleophobic on the international version. Sprint version will likely be traded in for the grey version fairly soon.
That said, I also see what dbpaddler (I think that's who mentioned it) was saying about the curved glass. At the very edge of the phone, it almost looks like there's a screen protector on the phone already, but it's the actual glass. Makes way more sense to me now because the glass is actually, slightly raised on the edges.