feel a bit silly now.
Sorry Kenneth, I really thought the discs were the exact same thing.
I think my confusion must be rooted in the fact that the US promo images
and the Japanese promo images
are literally the exact same thing. Heck, the box was the one thing they DID change for Baccano! - so why would R.O.D not be the same discs?
Come to think of it, R.O.D is the only
re-authored Aniplex BD title so far - though obviously Madoka will bring that total up next year.