The main difference between competitive and casual play is that competitive players focus more on winning tournaments and other events. In contrast, casual players are more interested in simply enjoying the game. Competitive players often build their decks around specific themes or strategies and always look for ways to improve their chances of winning. On the other hand, casual players usually don't worry too much about winning, and they're more likely to build their decks based on personal preference. Whether you're a competitive or casual player, the important thing is that you're enjoying yourself. If you're not having fun, then playing is no point.