Who sold more albums metallica or iron maiden?

According to the Recording Industry Association of America (RIAA), Metallica has sold more albums than Iron Maiden in the United States. As of 2022, Metallica has sold over 120 million albums worldwide, while Iron Maiden has sold over 100 million albums worldwide. However, it's worth noting that both bands have had successful careers, and their sales figures may vary in different regions and countries.