I believe both these products have other surfs. People dot tend to think of btms as a surf, but it is--just a different category than the typical shampoo detergents. It does have some cleansing power as does centrimonium chloride and polysorbate. Emulsifiers can emulsify oils enabling them to be washed away. They do not foam much but can in specific formulations. For instance, you may notice your conditioner foaming even when it doesn't have typical shampoo detergents. The mentioned products are gentle cream cleansers which are different from traditional shampoos. Good options for the low poo/no poo ladies.
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