The American Best Buy exclusive edition came with a sheet with a code to download two bonus weapons and six alternate costumes. The title on the spine is written in plain text. It also came with a manual, and the disc seems to be the same as with the other editions.
4. Download coupon (censored code)
Thanks to three unknown eBay members (images 1-2, 4), and eBay member jonny81-4 (image 3).