FbR unloads the same number of muskets faster and in a more concentrated dose than platoon fire. It should therefore be quicker to inflict maximum damage on charging cavalry than platoon fire.
Whether there is a greater morale hit for being under supressing fire or taking casualties quickly should determine when/how likely a rout is.
I'm not certain if this is true but FbR may be more flexible vis-a-vis the position of the target, as it's possible each rank updates its target as it comes ot fire. That could be true (and should be) of each platoon in the platoon firing drill though...
Bookmarks