A European option differs from an American option in that. a European option may only be exercised at the expiration date, while an American option may be exercised on or before the expiration date. a European option typically has a unique payoff calculation structure and may not be found on centralized exchanges. while an American option has a more fypical payoif structure and can be found on centralized exchanges. a European option may be exercised on or before the expiration date, while an American option may only be excrcised on the expiration date. a Eurogean option is an option bought in Europe, while an American option is an option bought in the United States