But neither is the most powerful male or female channeler, so you can't really infer whether Moghedien or Asmo is effectively stronger, especially when you throw a sa'angreal into the mix. While you could make a good argument that Asmodean can hold more of the One Power than Moghedien, you don't really have any evidence comparing their feats to make a comparison. It is also possible that Lanfear could be able to hold only a little more of the One Power than Asmodean could, while being able to generate effects that are equal in magnitude to anything Lews Therin could do. Even though we are told that males and females are essentially equal on average, this cuts the other way as well: merely having more strength doesn't necessarily make a channeler effectively stronger than another - in fact, we've seen over and over again that despite any strength gap, the top level Forsaken are pretty evenly matched to the point where only the Dark One's intercession prevents them from going against one another to eliminate rivals. The properties of saidar could mean that a female at 60% is equally able to match the capacity of a male at 80% on the scale, though there might be areas where one or the other would be superior, whereas the average woman and the average man would be effectively equal in all areas.