Well, with the Shrouded Gloves from the Dark Brotherhood storyline, the dagger does x30 damage rather than 15. And the other one handed weapons would only do x12. Blade of woe is a dagger with DMG78 if I'm wearing my melee gear + shrouded gloves (which I can cause lv100 sneak is boss.) And my Daedric sword is DMG117
117 x 12 = 1404
78 x 30 = 2340
Also works with a sword...and doesn't have to be a sneak attack. Ive knocked a guy backwards before and then did a power attack with my sword and its done the backwards-throat-slit finisher.
Huh. Never seen a sword swiped across a target's throat from behind. I've only seen
-Both Swords thrust through the target; lifting them up in the air before dropping their corpse.
-Grab the target by the head, then thrust a blade through their back
-Quick 360 spin and slashing the target's throat.
-Swipe blade across their chest; target falls to their knees. Then cross blades across target's neck before beheading them.
-Power strike; decapitating target.
Then again, I always sneak attack with daggers since that assassin trait. Maybe I just don't remember it happening. :x