This value reflects the average for all common apple varieties after they have been peeled. Since the skins contain a fair percentage of the antioxidants, when you remove them the value goes down regardless of which species of apple is being measured.
ORAC Source
USDA Database for the Oxygen Radical Absorbance Capacity (ORAC) of Selected Foods, Release 2 - Prepared by Nutrient Data Laboratory, Beltsville Human Nutrition Research Center (BHNRC), Agricultural Research Service (ARS), U.S. Department of Agriculture (USDA) - May 2010