Here for the purpose of comparing their appearance, I've put crafted 2H swords: first on the left is Iron, second is White Iron, third is the normal purchasable 2H sword from the blacksmith/combat weapon merchant. Last is the Ornate Flamberge. The White Iron 2H sword was an exceptional item crafted on my first time using the Prosperity Smithing Hammer =)
As you can see in the pic below, the Iron 2H sword is slightly duller looking than the normal 2H sword. The White Iron 2H sword looks the brightest of the three.
In the pic below, from left to right: Normal, White Iron, Iron, Meteoric Iron, Copper.