The Abbott's Okeetee is an animal with a linage from the line maintained for 30 plus years by Lee Abbott. I think there are several lines out there with Extreme in the name, but I'm guessing you mean Don Suderberg's? I believe a lot of Don's original stock was line bred by Abbott but some were from other sources and if I remember right, he decided awhile ago that he had worked with his line long enough that they deserved a name separate from Abbott's.
All of the different lines tend to look slightly different from each other, some more than others. I don't notice a great deal of difference between the Abbott's and Don's though. All of these lines are line bred normals, not morphs. They are made by breeding several generations of snakes, refining the look the breeder wants, trying to "fix" a certain look in them, not like the simple recessive genes of the morphs.