After my experiments with sepia I decided to see what other colors are out there. So far I've picked up these three Conte colors: sepia, bistre, and sanguine. Sepia and bistre are very close, but sepia is just a bit redder. Sanguine looks a bit more like rust. In these samples, the left side is hard pressure, middle is light pressure, and the right is blended with a tortillon.
In a few days I'll have some more colors to show off, from a different brand.