I looked at the two. The special edition came with a free copy of McAfee Anti-Spam software, but otherwise I couldn't see a difference. I asked the clerk who was passing by, and he said the routers were identical. (OK, a Fry's clerk is not highly reliable, but I tend to trust them when they confirm what I think I already know.)
So for $15 I could have gotten a free copy of anti-spam software.