What's the difference?

Idk the difference between chams and wallhack. Now, when I use chams, the people are red until visible, then they are green. When I use wall hack, they're always green, so I thought I could shott them through walls (STW), but I can't. So, does anyone know the difference?

Pretty sure that Chams is just turning the people colored, I think the default for public hack is red/green I don't hack much so I unno. Im mostly legit
Wallhack is just being able to see the people through the walls, not shoot through them. I don't think there is a public version of a hack that allows you to shoot through walls yet. But than again I don't know. Hope this clears things up for you.