I'm not buying this Groucho guy on the left being real, myself.
I don't like his white skin coloring. I don't like his tufts of Mohawk hair, which looks like it's painted on, and I don't like the weirdness of his shirt-pattern, which is nothing like that of fake-Lovelady on the right.
Moreover, he is quite divergent from the other Hughes Lovelady who is supposed to be him.
We are supposed to be looking at the exact same frame here from the exact same movie. It looks to me like they realized that the weird geometric pattern and weird Mohawk were a mistake, so they washed them out.