Wow. Those are... really good. Nue's dress looks especially neat for some reason.
There are some issues though. Patchcon!Nue's hair looks too flat at the top (needed to be more rounded), big!Nue's head looks too pointy and big!Suwako's seems too wide, also both heads have awkward shading on the left side (probably too much of it)
Additionally, Suwako's hat's eyeballs seem a bit awkward around the edges, but I can't blame you since they're kind of small. Also, the way Nue holds the scythe seems kind of... awkward, unless I'm looking at it the wrong way.
Edit: Now that I think about it, Suwako's hanging arm seems a bit long as well...