...I just figured the manga is using alternate characterization to be perfectly honest. I've got nothing against that either, but it does make me wonder where the show and the manga diverge from one another and if its intentional or just a result of art style.
For example, how would Ruby being a more blood knight type character change the events of the story? Does Yang being a psychopath change her character arc and if so, how?
Heck, there are entire sections of fan fics dedicated to 'what if' type scenarios and I like to think about such things! Just trying to figure out if the manga is doing that, if the mangaka for RWBY is changing things because he/she is viewing the show through a different cultural lens and drawing different conclusions than we are or just trying to provide a different experience. Its fun stuff!
EDIT: ...Huh, apparently it was announced that the manga contains canon events and whatnot. So...does that mean the explanation for the Armored Knight that Weiss fought is canon? Cause I like that tidbit. And also that RWBY may be getting a traditionally 2D animated series. Huh.