Just in case anyone hasn't done the WAR and DRK 50 quest line. Spoiler alert.
After doing the War quest line and keeping the Beast inside controlled, I began to wonder. Is the darkness that tried to take over when doing the Drk quest line the same thing?
In the War quest line is stated that to lose control of the Inner Beast is to become a machine of rage and destruction. And then you have your Dark Side who tells you to just go and kill everyone and not be bothered by trifles like returning some guys cabbages. Both have to be kept in control or else bad things may happen.
So are they really that different? If they are, what sets them apart from each other lore wise?