They all were the same breed when the hatcheries started selling them that way.
All I know is you are fighting a losing battle that is turning a large part of the poultry community ageist the breed not the hatcheries.
No EE is not a breed, it is a derogatory term used to describe non show quality birds of a breed. If was a term to be used on the breeders whos birds were excluded from the "new" standard.
If you still think you are going to win this fight then go ask a Dominicker (spelling) or Barred Rock breeder how long they ave been working to be split in to 2 breeds an how its working for them.