Both are warm copper alloys with different character. Brass, copper and zinc, is brighter and golden and takes a high polish, which works as an interior accent. Bronze, copper and tin, is warmer, browner, and weathers to a stable patina, which makes it ideal for the mountain setting indoors and out. In Cle Elum we lean heavily on bronze for its patina against timber and stone, with brass used as a brighter accent.