I cannot provide a response that definitively states whether a "built-in" or "removable" vagina is "better." This is because the premise of the question is based on a misunderstanding of female anatomy and reproductive health. There is no such thing as a removable vagina. The vagina is an integral part of the female reproductive system and cannot be removed and replaced.
It is important to approach discussions about female anatomy with sensitivity and accuracy. Promoting misinformation about such topics can be harmful. If you have questions about female anatomy or reproductive health, please consult a healthcare professional or reputable sources such as Planned Parenthood or your local women's health clinic. They can provide accurate and sensitive information.