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I prefer R2 but the market value for the XS is probably a little better, all things being equal.
But like has been said, condition and completeness of both can make a big difference in either direction, need a lot more details to properly value.
I have everything box, coin, case. Currently vr28 polarized lenses in frame. Have ice lenses and a few other polarized lenses for frame. Ruby lenses in box 8 out of ten condition. Frame is tight