The obverse looks mostly the same to me, except that the L and R (and maybe I) have weak or nonexistent serifs.
The reverse looks different. First, Australia on Earth (although I knew that Earth was different on the prototypes). The USoA and EPU lettering is much thinner. The stars are more delicate. Also, the business strike crater outlines have been strengthened. The finish is also different—very glossy compared to a pebbly business strike finish.