Barred rocks & dominiques ought to be black with a white spot on their head. EEs often have muffs, which will give them fluffy faces, they also often have green or yellow legs. Speckled Sussex, in US, have chipmunk stripes.
Barred Rocks ought to have single combs, I think dominiques ought to have rose combs (I've never seen a dominique), most, but not all, EEs have a pea comb, Sussex ought to have single comb.