This is the deck that's specifically used for when Eleanor is dueling as the Red Rose Duelist, using the dueling system and rules set up by the game Duelist of the Roses. As dueling is different in that game, the effects of some cards are different as well. While I've noted some important information for myself on the lists, a full list of what the cards do in the game itself can be found here.

You can see a mock-up explanation of the differences here, as well.