What is the difference between Choice EF and Superb EF?
Choice EF is used when a particular coin is among the best examples of a given coin that is in EF condition. In this case, the coin will not exhibit effects of wear beyond the slightest effects of handling or circulation (i.e. it cannot have a scratch or flan crack, however unnoticeable). Also, the coin may not have detrimental effects of striking, such as being struck off center. Superb EF is a slightly more liberal standard, where a coin may exhibit a hairline scratch that is not visible to the naked eye, or it may be struck slightly off center.
