Yes the eagle is mixed with alittle copper and silver, but U.S. gold coins (not all) have been mixed this way to maintain sharpness and durability. I do not plan on handling the coin (either one ), but it being the first U.S. coin minted of 24 kt. gold, I don't see as many great reviews about it. Perhaps it just boils down to choice. It is just that most dealers seem to go with the eagle as the one most sought after, even though the eagle is alittle cheaper in price!