TPE (thermoplastic elastomer) and silicone are both materials commonly used to make sex dolls. The main difference between the two is that TPE is softer and more flexible than silicone, giving it a more realistic feel. TPE is also slightly more porous than silicone, meaning it can pick up more dirt and bacteria if not cleaned properly. Silicone, on the other hand, is more durable and easier to clean than TPE, and it is non-porous, making it less susceptible to dirt and bacteria.
Because silicone dolls are often relatively hard, it is possible to “draw” the face more beautifully using makeup. That looks very nice in pictures. The downside is that in reality it looks somewhat unnatural and because of the hardness, the mouth anus and vagina are often less usable.