I think most current Salomon boots are pretty consistent in their sizing, but if your husband's boots are many years old, there's no telling how things may have changed. He'll need to try on a new pair.
As to "function," all of Salomon's better boots now use speed-lacing (except a couple with the BOA system); he probably wouldn't want to use the remaining low-end models with regular laces. For a medium-stiff, very good all-around boot, try the Dialogue or the F20. For something stiffer, try the F22. For really stiff, try the Malamute.