There are multiple items with the same stats and name. For example, when I was crafting my steel armor, I could craft one with shoulder pads, or without shoulder pads. There was no difference in statistics, only how it looked.
Upgrading works like this: You go to a grinding stone, and select the weapon you want to upgrade. If you have the required ingredients, (for example, upgrading a steel weapon requires 1 steel ingot), you can upgrade the weapon, which improves the quality of the weapon (the weapon gets a "tag" after the name, example: "fine" or "superior").
das hab ich nie erlebt, is ja geil
