Dummy models don't reflect light, usually in black or dark color, so that the meaning of dark color will not be lost because of reflection when in the sun or under strong light.

The price of these two molds should be the same. Think about it. When reading a magazine, you can't see clearly if there is strong light. If there is enough light, it is recommended to use a false mold. Otherwise, the details will reflect strongly under strong light, and you can't see clearly what is far away.