There is absolutely a difference and the difference isn’t whether you are competitive or if you compete. As an ex-professional athlete who, in my own mind, is one of the most competitive people I know, it really erks me to hear adults tell their children that winning isn’t everything because it is. As an athlete if you don’t win you get fired.
With that being said when you compete, your goal is to win which make you competitive. If you do not compete to win, you should only consider yourself as someone who participates in a competitive event. However someone can have a competitive spirt without competing because being competitive means that you strive to win in all aspects of your life.
My two cents…..Enjoy.