EPS vs XPS %EC%8B%9C%EA%B0%84%EA%B2%BD%EA%B3%BC%EC%97%90 %EB%94%B0%EB%A5%B8 %EB%8B%A8%EC%97%B4%EC%84%B1%EB%8A%A5 %EC%A0%80%ED%95%98