I know - two completely different dining experiences.
I have an Epcot evening planned and we are staying at the Dolphin so either restaurant will work logistically. Never been to either, but understand that the food at the Yachtsman is likely superior, but the Biergarten experience is unique, but have heard mixed reviews on the food. The family enjoys premium steakhouses, but we have plenty of these in our hometown of Houston, so going a week without a quality steak is not a big deal. Have gone to Le Cellier on prior trips, but the last time was underwhelmed with the meal, so that is not an option.
Looking for “liner” wisdom?