The 800XC is a very capable tourer, and it's a more versatile bike. With the big front hoop, you have to push it into the corners a little. It won't fall the way the big GS will. If you're not doing two-up touring, my guess is that you'll have way more fun on the XC. I have owned both bikes and would have kept the XC for good if not for the fact that my plans include substantial long-distance trips 2up.
Uva uvam vivendo varia fit. -- Agustus McRae, Lonesome Dove