I promise I won't get all political.
While it still uses the same card from 乐动魔方 2代, the format of the data saved on the card has changed. Inserting a card with 乐动魔方 2代 data into 乐动魔方 全国对战版 would cause the game to reset the data and write in a blank data for the latter game. Inserting a card with 乐动魔方 全国对战版 data into 乐动魔方 2代 would render the card unusable.
