Yeah Superman doesn't blur his face. His Secret Identity goes on the fact that he slouches, wears bigger suits, does his hair differently, and holds himself with less self confidence. Basically Clark Kent is a guy who isn't memorable - could be any guy in an office who you don't know. Where as Superman is a guy that you wouldn't even believe has a Secret Identity (he doesn't wear a mask the public and most superheroes and villains don't even think he had a secret identity). Jay Garrick and Mon-El both do the slight face vibrate but it's not canon to Superman.