I have the PocketWrench 2, as well as a few of the EDCGear copies. The PW2 has better fit and finish, but they both work. The PW2 has sharper teeth, but again, they both work. I haven't had rust issues with any of the copies or the original.
After about three months of constant use, the copy is holding up remarkably well. To be honest, I think the copy is a better value. I hate saying that.