The Griso, Stelvio and Norge are all referred to as "CARC" bikes for their shared rear diff design.
Idk what all the differences in the frames are, but iirc shock swaps have been done between the Griso & Stelvio; the longer shock from the Stelvio to raise the Griso a bit and vice versa, so they're not that far apart.
At first I didn't like the look of the Griso, but it grows on you, it is a fine back roads roadster.
When I saw a good deal come up on a well farkled 2007 2 Valve, in the faster color, I couldn't resist adding it to the herd,lol