With the C1, you’re likely to only get, on average, a 20-gram grind, whereas, with the Timemore Chestnut G1, you should get a consistent 30-gram grind. This means that with the G1 you get a larger grind with less effort than is needed with the C1 to produce the same amount. For the C1, the knob, the scale switch, and the inner part of the bottom container are made of plastic. However, for the more premium G1, the scale switch is made of steel, the knob is wood, and the internal container is Aluminum.