Hello
Officers also wear helmets in combat and normal soldiers also had a Schirmmütze (with slight differences not easily seen on b/w photographs).
The main difference is the collar insignia and the shoulder strap which indicates the exact rank
Enlisted collar. Shoulder strap in combination with rank chevron indicates rank
A Non commissioned officer (Unteroffizier). Different collar, shoulder strap
Officer.. Different collar insignia, different shoulder strap
Here on my site you see what insignia shows which rank
http://chrito.users1.50megs.com/uniformen/basicheer.htm
Additionally the officer tunics were tailored a little bit different and of better quality.
http://chrito.users1.50megs.com/uniform ... iforms.htm
\Christoph