Do you, or do you not, see that she had a mole under her right eye? So, any image of a Marguerite without the mole should be the real Marguerite.
But, here is the most reliable image we have of the real Marguerite, precisely because John Armstrong got it from a private source, a co-worker of hers, from his personal, private photo collection.
So, she was the real Marguerite. But, what about this one?
Well, there is no clear appearance of a mole on her. But, it would have been the easiest thing in the world to take out. I still think, for the reasons given in the previous post, that she is the Marguerite impostor.