Kaolin is a common ingredient in cosmetic products, for an instance, almost all deep cleansing mask using kaolin as extracting medium to draw out dirt & impurities to achieve purification and detox purposes.
When you observe kaolin via microscope, you could found out kaolin has a crystal system with triclinic structure shown below.
However, halloysite clay naturally occurs as small cylinders which average 30 nm in diameter with lengths between 0.5 and 10 micrometres. With this unique structure, halloycite clay could act as an absorbent to extract dirt efficiently than kaolin do. It also explains why Living Nature deep cleansing mask could perform better than other brands in the market.