A classification. How are they different?

Based on general appearance alone, they can be roughly divided into three groups: 'human', 'reanimated' and 'canine'.

I see. And what else besides appearance?

Strong, opportunistic hunters, usually gregarious - form packs or have family groups, little qualms of eating anything past its prime and are frequent visitors to burial grounds.

It'd be interesting to see those so called ghouls face the trashes of my kind.

And? Are you the puppeteer hidden behind curtains?

Me? I'm merely a spectator.

Aren't we all?