Vague name, but they're harder to draw lines in a ribbon brush form.
All brushes can change color. They're good for outlining things that need a detailed outline like fuzzy surfaces, as well as hatching and decoration.
![](//assets.clip-studio.com/en-us/description/2093323/img/a658809307-574e-278d-5525-69c26cf286.png)
![](http://assets.clip-studio.com/en-us/description/2093323/img/a658809307-574e-278d-5525-69c26cf286.png)
Pardon the sparse description, I think they're easier to use rather than explain.
all lined up