19th Century Folk Art Bust of a Black Man with Derby

I recently acquired this large folk art bust of a black man with a derby. It bears a striking similarity to the folk art figure of a black slave that used to be in the Harvey Kahn collection for years. I've put the two pieces side by side so you can see the comparison. Not sure if it could possibly be by the same anonymous artist or maybe both were based off of a period illustration? Who knows?