Johnny,
In brown red and birchen the lacing should be restricted to the upper half of the breast. Shafting in these two varieties is considered a fault. With the black golds and black silvers, the lacing should extend over the entire breast, the body, all the way back to the tail. Even the tail and wings should show some lacing preferably. Shafting is required also. So we are working with two extremes in color. Same e-locus on all, but unknown modifiers will determine the variety. Does that help?