Final answer:
The reference material does not provide enough information to accurately answer which two variants of the myth of Sisyphus are considered by Taylor, nor does it discuss Taylor's argument for preferring one over the other. More information from Taylor's texts discussing the myth of Sisyphus would be required to provide a complete answer.
Step-by-step explanation:
The two variants of the myth of Sisyphus considered by Taylor are not explicitly mentioned in the provided reference material. However, in philosophical discussions, the myth of Sisyphus is often employed to illustrate existential or ethical dilemmas. The basic story is that of a king punished to endlessly roll a boulder up a hill, only for it to roll back down each time he nears the top. Philosophers like Albert Camus have famously interpreted this myth to represent the human condition and the search for meaning in an absurd universe. Richard Taylor could potentially use this myth to explore themes related to freedom, meaning, and the essence of human existence, particularly in the context of his Libertarian standpoint on free will, as outlined in his work A Contemporary Defense of Free Will. That said, without more specific information from Taylor's actual texts discussing the myth of Sisyphus, this question cannot be accurately answered. Taylor's argument for preferring one variant of the myth over another would depend on his philosophical objectives and how he applies the myth to his theories on free will and agency.