The Extra Knights USA version figures can be told from the Japan versions by the black “Warning!” sign on the right upper corner of the card. There are some differences in the actual figures as well, and the USA version figures are thought to be slightly less detailed than the Japan version figures. Also the prices are generally speaking a bit lower.

There is also an Extra Knights USA Collectible Edition, a box set of 4 (6) figures. There is no Japan version of this set, as it was made only for the US market.