User blog comment:LoganWoerner/January 2014 Blueprint: Merall vs. Niha/@comment-11429692-20131231023255/@comment-11429692-20131231024957

Well just as the chapter title says, Niha is fast and light while Merall is more force. Therefore, Niha would be able to get in more hits while Merall would get less in however, her strength would mean she doesn't need to hit as many times as Niha :P.

Well, I should've said I don't know much about the Bionicle universe in general, including alternate universes. That's why my stories will be in a different solar system :P. I do say what you're saying though. Wasn't there a third part of Sphereus Magna? Maybe it crashed there? :P