No difference, it's a known fault that came to light when the US got the event. Yours sounds no different, except for possibly the missing storyline fluff.Well, that sucks. I thought all codes gave the same kind of Diancie.
I'm playing in Japanese. Maybe that made a difference? The stats page says I got it from the Pokémon Center and the card says "Thank you for visiting the Pokémon Center" even though I got it from wifi.