What is the difference between gamesmanship and sportsmanship?

Sportsmanship is the principle of enjoying a sporting activity with the considerations of respect, fairness and ethical concerns to others.

example: At the start of a football match, the two team captains will shake hands indicating that they are going to show good sportsmanship. however, if a player shows poor sportsmanship, such as discriminating another individual, the activity will be spoiled for the other competitors.

Gamesmanship is the principle of following a code of conduct within the sport. It is about winning the sport without violating the rules of the sport.