You are mistaken. They must both be SWORDS (or daggers), but do not need to be identical.Gregor said:If I am not mistaken, you must use two of the same blade in order to use this feat: two shortswords, longswords, scimitars etc.
Cheers,
Someone fighting with Rapier-and-dagger qualifies for Twin Sword Style. Someone fighting with Bastard Sword and Shortsword does, too.
The Doublesword is the only Core double weapon that would qualify for the benefits of this feat. ^_^