Questioin on experience ramps

So I’m trying to change the experience ramps for dinos. I see on the PrimalGameData_BP that you can change the ramp for “easy”, “medium” and “hard” dinos. What does this mean? Is this a category like the gigant would be a “hard dino” and the dodo an “easy dino”? Or does this refer to the difficulty offset (which doesn’t make sense to me as the offset is a continuous variable, not an easy - hard option)

From working with the xp ramps, my best guess, and it’s only a guess would be that it may be based on dino size, small, medium, and large