Help me here. I know Sku 13-660 is Flak XLJ G30 Iridium. What is Sku 41-921, also described as G30 Iridium? Is this an Oakley.com error? They are priced differently? I am hoping that the 41-921 is a G30 Black Iridium, but anyone know. O-Review hasn't clarified this for me.