Grenadiers, Grenzers, Hussars, Jagers...It doesn't make much difference to me, since I want them all....eventually! I'm so starved for decent looking 18th Century figures in plastic, that as long as their wearing a tricorne, mitre, bearskin, mirlton, or busby....I don't care! Even a millimeter or two (plus or minus) in height is no big deal to me. When viewed from three or four feet away on the wargaming tabletop, the eye is tricked into seeing the whole spectacle, and any mistakes disappear.
Your original post may not have been that far off either. I understand that Grenadier Companies were routinely used as skirmishers in the SYW.