The sequel Stormtrooper helmet feels like a natural continuation from the original, but there are distinct differences. The helmet is not symmetrical – there’s only one breather/vent on the bottom near the mouth, on his left side. The black “mouth” area under the white nose plate appears to be a cloth/mesh (which you can better see in the detail shot below). The eye lenses are still separate, but set into a black frame to connect them and give the illusion of one single piece.
Indierevolver: First Look at the Stormtroopers From Star Wars Episode VII