Mythology: Soap-powders and detergents

According with this article they talk about soap-powder and detergent in the same way to clean the "dirty" products. In my opinion I think that they have different points of view; soap-powder has more the human body market, and the detergent have the "dirty" clothe market. Between both relations came the other different types like liquid, foam etc. Talking about the "psychoanalysis" between the consumers and products; consumers just buy products depending in their necessities, and in this point is where the advertising work, giving them all information of each particular products and that’s how this market work.