there are more than thosae two no?
Yes there is, but these two are the main lines.
Scott is also called performance type. Smaller built, about the same size as a PitBull.
Johnson is more Bulldog looking, taller & stockier. Like a Bull Mastiff in size.
Dave Putnam's "The Working American Bulldog" is a must read for all AB's lovers. There might be other good books out now, been a while since I looked.
http://www.amazon.com/Working-American-Bulldog-Dave-Putnam/dp/0967271002
