"Who cares about which is better? Just play and enjoy the game, stop arguing. "
This.
It seems to me that both daggers and swords results in the same end state >>>>>>> sneak attacked enemy = dead. Lets take 2 situations:
A. Sneak attack with dagger
Target enemy has 1,000 k health
Backstab dmg with Dagger does 10,000 dmg
Enemey = Dead
B. Sneal attack with Sword
Target enemy has 1,000 k health
Backstab dmg with sword does 18,000 dmg
Enemey = Dead
You see same end result. It doesnt matter what does more dmg as anything besides 1000 dmg is overkill and completley usless. The argument is mute in the case of a backstab where you can 1 shot kill the enemy with either weapon.
Now some of you mentioned going to melee combat when sneaking isnt viable....what kind of asassn doesnt have a set of swords available for toe-to-toe fighting. The point is you have a choice to use all available tools at your disposal. So when you sneak use a dagger if it suits your style and when you fight use some damn swords.