Alrighty, so you want to know the difference between "CCG Premiere Edition" and "CCG Unlimited Edition." You might think it's complicated, but it's really easy! The Premiere Edition cards were the first to be released - hence the name "premiere" meaning first. They were in booster packs, and the first edition of the character decks. They have the following picture in the bottom left hand corner.

The Unlimited Edition cards were released a little later, and were found in the Past And Future Expansion booster packs and Past Expansion deck as well as the Future Expansion deck. They had this picture in the bottom left hand corner.