"Joe's facial features seem to have been based on a real-life person that appeared in the book titled "Face", which is a collection of portraits taken by photographer, Bruce Gilden, who is best known for his candid close-up photographs of people." So I think the appearance may be a mere coincidence, What are some personality traits you noticed to be similiar?

^ tempers. Quick to the gun. Being a general dick. Joe plays almost the same role as the hunchback from for a few dollars more. Watch the film and you'll see what I mean. They are almost carbon copies of each other

I'll re-watch the movie, (which I'll have no problem with because I love it.) and try and look out what you pointed out!