It seems pretty clear to me, in the English rules anyway, that the Ranged Class of units never hit on "Valor" [fist] results. I believe the extra hit probability referenced comes from, as you already surmised, the extra combat die rolled by a Blue Rank Ranged Class unit, but does not come from hitting on a "Valor" die roll result. Anyway, that's the way I read it.
Unit Classes are indicated on pg 15 (English rulebook) of the Core BoW Rulebook as:
Unit Ranks (obviously) are:
1. Green - 2 dice
2. Blue - 3 dice
3. Red - 4 dice
Attack TYPE is also indicated, and again ranged attacks do not hit on "Valor" [fist] die roll results, they also do not cause an engagement token to be placed.
My opinion is that one can safely assume the Bw/oB ranged units do not hit on "Valor" [fist] die roll results.