They are a little different, not enough that you can tell without really looking. I have factory on front and Fr 20x10's in the back and you cant tell they are two diff manfactureres. With the 10's the lug nuts sit inside the hob of the wheel and cant really be seen.
I'm planning to install black wheels this month or early November. A 20" black wheel was my initial decision, but I've seen a lot of good aftermarket black wheels to choose from so I might go with aftermarket. I'm thinking of getting Vision wheels since it'll go well with my high-performance modification.