It is believed that the massive, cyclopean Gronn are the ancient ancestors of the ogres. If so, the ogre lords of Outland are the only ogres known to retain some of the physical traits of their gronn progenitors, such as the bony, calcified protrusions on their head and back, as well as a portion of the gronn's immense size and strength. Other unique characteristics possessed by the ogre lords are their intelligence and reasoning abilities, which are more acute than those of their ogre cousins. This combination of brute strength and increased intellect make the ogre lords worthy of both respect... and fear.
Like the Gronn (and unlike the Ogres), the Ogre Lords have only one eye, and flappy, triangular ears. It is possible that heads of the Ogre Lords (or their unknown, immediate descendants) were used in the process of creation of Two-headed Ogres (since the second head looks very similar to that of an Ogre Lord)