What distinguishes a true competitor from a mere participant is that the competitor derives enjoyment from the nature of the competition aside from the prize at the end. She gets a rush from the gaming dynamics and appreciates the beauty of the game. At the end of the day, you play for the love of the game or not at all.
To the consummate competitor, winning is not the same as beating your opponents. Winning is playing to your absolute best; beating others is a corollary effect, not the primary goal.