BTW–never noticed before, but looks to me like Botti might be an upstream player; his head seems tilted forward and bell up and looks like his bottom lip may be jutted out beyond his top a bit.

That could be why there’s such a mark on his top lip like that, it could be that he’s putting the pressure up there rather than under his bottom lip like downstream players do. Could be that the tissue is a bit thicker / denser under out bottom lip than above our top lip. Just a theory.