What is the difference between the pencil and the brush?
The pencil is a stroke tool and the brush is a fill or shape tool.
Use the contour editor tool to select a pencil line and a brush line and you will see that the pencil line only has a center stroke, whereas the brush line has an editable outline (i.e. it’s a shape.)
Also note that the brush tool allows for thick/thin lines and the pencil does not.
I did not know that.