No, large lima beans and butter beans are not the same. Large lima beans, also known as 'Sieva' or 'Fordhook' limas, are larger than their smaller counterparts and typically have a creamier texture.  They tend to be more favorable in flavor than butter beans, which have a more earthy flavor profile.  Additionally, butter beans are more often used in Southern cuisine for dishes like succotash or baked bean casseroles, while large lima beans may be eaten whole or puréed as part of soups and other dishes.