Better built most likely lighter more practical wheels is not the definition of a knock off. Besides, chances are they will cost more for the higher quality. If they made TRD Pro wheels in 8" wide and larger offset I would already own them.
Then they should do a different design. You have to admit that whoever see this design will say that it is a Toyota TRD design rather than saying that it is a FN design. They may know materials and constructions, what a shame that they couldnt come up with their own design too.