the chances are the first boy will be bigger, stronger, and more coordinated. He is much more likely than the other boy to be chosen to play in junior teams. He will then get better coaching than the others. and will play many more game,so will also get more practice. In the beginning his adventage isn't so much that he more talented, simply that he is older. He was lucky enough to be born in the first months of the year. But by the age of 13 or 14, with the extra coaching and practice, he really will be better than the others, and far more likely to be successful.