Yes, that head is much too dark to belong to a vanilla. Still a pretty thing.
And this other one certainly has the head fade to be a vanilla. She seems pretty light colored as well. It is certainly possible she's vanilla. Although I have seen some ridiculously light normals as well. In fact, the girl I breed to make my vanillas is that light. But her head is not as faded.
I always say, it would be so much easier for me to tell if I could see them in person. Once you know for sure what a vanilla looks like, it becomes nearly impossible to mistake them for a normal. But with pictures....it's a lot harder. I'm going to say there is at least a 90% chance she's vanilla.