2hd vs dual wield

[mystang89]

Hey, I've been wandering since I hit whatever level gives you dual wield, which weapon set would put out more dmg? I have Dragon Horn Ykesha 8/23 in my primary and Ebony Bladed Sword 7/24 in my off hand as my dual wielding set. I have Silver Swiftblade 16/24 as my 2hd. The dmg and speed of the 2hd is = to that of the dual wielding so I've been using that but I know that with Dual Wielding you get an extra hit or something like that with the mechanics so I've been keeping the Dual wielding up as well.

Which is better and why?