Now that it's not so early, the book cover doesn't look like Epicurus. As for #12, the shape of the head seems wrong and he's way too stern to accord with the images of Epicurus that I'm used to seeing.
A large part of the problem could be that different artists had different interpretations. Or different levels of skill. How many statues of contemporary athletes have you seen that look nothing like the athlete?
BTW there's a YouTube video of James Corden showing David Beckham a goofy version of his statue before the unveiling, which is a great send up of the modern athlete statue.