I think Naomi's nastier, although Heidi never seems to have the best attitude either. These two divas are about the same size _ Heidi's weight gets reported from 119 to 130 pounds, and Naomi's from 108 to 120. Aside from throwing phones and pulling hair I'm not sure either of them can do major damage, since for all Naomi's tantrums, she picks on people not likely to fight back. Still, I'm comfortable with Campbell by a bitch slap.