The LE also possess the “fast moving” stat. Perhaps the Ridoharjoz should have superior mobility and perhaps even stamina in the absence of stats to properly approximate a dismounted combatant or much in the way of armor in their graphic depiction? I was actually shocked as I assumed they already possessed these advantages.
Both the RH and LE ride "light" or "medium" horses, which both use the fs_fast_horse skeleton. Lightly equipped guys on quick horses tend to be pretty fast. Moreover, making the RH faster and/or more "enduring" would hardly appear logically justifiable given the rather small and unimpressive horses they had to make do with most of the time. Deep forests with scant good farmland kinda suck for horse breeding after all.