Board Thread:Speculation House/@comment-14138255-20141031002615/@comment-6863431-20141201021420

Well that settles the hair issue. Almost the exact same minus, you know, hair color and wildness, but that could just be because it's harder to distinguish the individual locks on Raven's dark hair than it is on Yang's.

That picture helps point out jaline and eye change. And points out they have separate complexions. Also, neck sizes are slightly different.

So it looks like they at least doctored up Raven so she wasn't an exact copy. But I will agree they are pretty similar.