A philosopher making a living as a portrait painter

Elizabeth Vigee le Brun, the famous portrait painter of the late eighteenth century, was married to a man who saw her art as his private source of income. Finding that what she earned from painting portraits was not enough, he decided that she ought to teach. 
She recorded her reaction in her memoirs:

"I agreed to his request without taking the time to think about it, and soon, a number of young ladies came to me, to whom I shewed how to make eyes, and noses and ovals, which I had to correct all the time. This took me away from my work and was a tremendous bore". 

One of her students, according to Guillois, was Sophie de Grouchy. Her biographer doesn't say when she had these lessons, but looking at the dates when  Vigee le Brun was teaching, it must have been during the early years of Sophie's marriage to Condorcet, before the Revolution, when the couple were living in the Hotel des Monnaies in Paris and Sophie was attending lectures at the Lyceum, a school for the public set up by Condorcet and La Harpe. Although Sophie may have been one of Vigee Le Brun's irritating students, having to have her eyes and noses redone by the master, she nonetheless became a very decent miniaturist herself. We have several of her self portraits (including one in the nude).

Sophie was in fact such a successful miniaturist that during the Terror she supported herself, her daughter, sister and her nurse by going around the prisons of Paris and painting the portrait of prisoners for their families. On two occasions, Guillois tells us, she avoided arrest by drawing the soldiers come for her for free. 

Looking through some documents, I came across a pastel miniature portrait of Manon Roland, drawn, apparently, at the Conciergerie. There is no signature, and I have not been able to trace any information about it. But doesn't it just look like one of Sophie's?