Inflatable dolls are the most economical adult dolls, and they are usually cheaper than the other two. However, their quality and use experience are generally poor. The shape of a sex doll is not realistic enough, and it is difficult to find one that can mimic the proportions of a real person's body. In addition, inflatable dolls are prone to breakage and often need to be repaired.

TPE dolls are mid-priced adult dolls, and they are usually superior in appearance and quality to inflatable dolls. TPE dolls are a real choice, they have a realistic look and soft feel, but need to be regularly coated with protective film to prevent them from becoming slimy.

Silicone dolls are the highest quality adult dolls available, while inflatable dolls and TPE dolls are cheaper options.

First, inflatable dolls were the first adult dolls, and they were usually made of a plastic that could be inflatable. They are light and easy to carry, but hardly resemble real human bodies. Silicone dolls, on the other hand, are more realistic, they have a soft touch, a more realistic look, but they are much more expensive than inflatable dolls.

However, TPE dolls are the product of the latest technology and they are more realistic and comfortable than inflatable and silicone dolls. Their surfaces are softer than silicone dolls, more closely fitting to the real body, and have a more realistic appearance. In addition, TPE dolls are more wear-resistant and durable than silicone dolls, and maintain fidelity after multiple uses.

Therefore, if you are looking for a realistic, comfortable and durable adult doll, then the TPE doll is the best choice. However, if your budget is limited, there are inflatable or silicone dolls available, but they may not be as realistic and comfortable as TPE dolls.

In conclusion, the choice of adult dolls depends on your needs, each doll has its own characteristics and advantages. If you have high requirements for appearance and texture, you can choose silicone doll. However, such dolls are usually expensive and easily damaged. If you're worried about the cost of a doll, you can opt for inflatable dolls, which are usually inexpensive and easy to store and use. However, inflatable dolls often lack the realism of silicone dolls. Finally, if you have high requirements for safety, durability and comfort, then the TPE doll is for you.