User blog comment:RaijinRising/RWBY's Visual Evolution/@comment-29684190-20190811071800/@comment-29684190-20190811075548

Okay.

Yeah, not using trailers makes sense, since they're just prototypes. Okay. (though the later ones get more and more canon. Red trailer had a different model of Ruby and completely different beowolves, the White trailer just had a red Myrtenaster and Weiss' powers were off, but the Black and Yellow trailers are pretty much completely show-accurate. What, the image of Raven is different and that's about it.)

(though the Knight 130s do appear in volume 2 with the same model)

Yeah, Mercury changed. From the almost unrecognizable 2d image in V1, or the eyebrows! model in V4