Based on the fact that the "new" one says multi-lingual, I would assume they have added some additional language support in the new printing. Assuming you speak English, I wouldn't think there is any real difference between the two.
The rules are just a sheet that say added the new cards when playing with 5. There isn't much else to it. Also since most of the cards are repeats of what is in the base game, I wouldn't expect them to change either.
The rules for Mystics is about the same so again just get whatever is cheaper.
Last edited Tue Nov 29, 2016 10:06 pm (Total Number of Edits: 1)