My husband who has normal/wide feet but a narrow heel, liked the F20 very much. It isn't as stiff as the f22 but I think the fit is about the same. (he didn't buy them because they hurt his ankles....) According to the salomon web site the f22 is a little stiffer, 5 versus 4, but if you found something you tried on and like the fit why not go for it. It is hard to find the f22's. I'll probably buy my next pair online.
(husband ended up with another pair of 32 T-M 2's.)