What is the difference between Earthenware & Stoneware?

Earthenware is fired at lower temperatures usually around 1000-1080°C. At this temperature the clay remains porous and the glaze will be a separate layer adhering to the surface. It is often used for decorative pieces or traditional storage vessels.
Stoneware is generally fired to higher temperatures. Stoneware glaze firings are usually around 1200C-1300C. At these temperatures the clay fuses and becomes strong and impervious to water. The glaze fuses with the clay. Stoneware biscuit firings are usually around 1000°c and glaze firings 1200°C to 1300°C. Because of its strength and water-resistance it is frequently used for making tableware and also sculptural work.