they talk about character customization it may have what your looking for.
Thanks, I was looking for that.
To answer a few overlapping questions in short;
players who appear to have more armor, will probably have more armor. The same way you would imagine a guy carrying a sniper would be the sniper (someone mentioned 'roles'), you can assume the heavier, tankier guy is a stronger, tankier character.
Roles will be shown in appearance, but mostly just in clothing. Player customization is something I personally love. You can expect good variety, from gender to skin color to hair style. We are even working on a system for fatter/skinnier and various facial features. (This system will also be used to add lots of variety to our zombies)
So stats will affect how your character looks? Will characters get fatter or skinnier in game? Are we going to be able to change our character's appearance after we create them?