What are the key differences between the duel decks Blessed vs. Cursed and how do they impact gameplay?

The key differences between the duel decks Blessed vs. Cursed are the themes and mechanics. Blessed focuses on white and blue cards with a focus on angels and spirits, while Cursed focuses on black and red cards with a focus on Zombies and vampires. These differences impact gameplay by providing players with different strategies and playstyles to explore, creating a unique and varied gaming experience.