Hearts and Spades are trick-taking games but have different rules and objectives. In Hearts, the goal is to score the fewest points by avoiding certain cards (all Hearts and the Queen of Spades). In Spades, however, the goal is to accurately predict the number of tricks you'll win in each round and then meet that prediction to score points. The suit of Spades is always trump in the game of Spades, which isn't the case for any suit in Hearts.