As Try2Handing mentioned, I think dual wielding only differentiates itself from two handed weapons when using on hit effects like 10% blind or elemental damage etc, or as two daggers to use scoundrel talents. In a straight damage race with a warfare build - identical damage/crits I think two handed is always more damage.
Two weapons does give you another slot for runes/stats on the item, I guess it's just up to you to decide if that's important.
My personal opinion is unless you want to try some fringe build like sparking strikes or an INT based hybrid with weapons that do elemental damage, dual wielding is for Scoundrels. They do comparable damage to 2 handed warriors and also have the luxury of movement skills and the ability to switch damage types with Terrifying Cruelty/Chloroform/Gag Order and attack physical or magic armor - whichever your party needs or is weaker.
And your english is perfect, don't worry.
