what is the difference between stainless steel and carbon steel used on the jewelry or watch displays

In watch/jewelry displays, a lot of stainless steel is used, and sometimes carbon steel is used. So what is the difference between the two? ?

The difference between carbon steel and stainless steel: 

Stainless steel is more corrosion resistant than carbon steel; stainless steel is more ductile than carbon steel. Stainless steel contains a lot of chromium and nickel, so the exterior color is mostly silver and bright, and the surface is smooth and has a strong metallic luster. The main color of the appearance of carbon steel is the color of iron, which will be much darker. Although carbon steel is widely used, it also has certain defects. During the smelting and forging process of carbon steel, steel defects will be caused due to equipment and process operations, generally including scarring, white spots, looseness, non-metallic inclusions, etc.