how are men and women equal in reward and punishment

Scholars have often stated that men and women are equal in terms of reward and punishment and that true superiority is in piety and good deeds. However, scholars also appear to imply that men have been created naturally more committed religiously, and that women have been created as being 'religiously deficient' by nature which sounds contradictory to spiritual equality. Here is a hadith regarding women's deficiency in religious commitment: > The Messenger of Allah (peace and blessings of Allah be upon him) > said: “I have not seen any lacking in reason and religious commitment > but (at the same time) more able to rob the wisdom of the wise, except > one of you [women].” They said: How are we lacking in religious > commitment and reason, O Messenger of Allah? He said: “Is not the > testimony of a woman like half the testimony of a man?” They said: > Yes. He said: “That is how she is lacking in reason. And when she > menstruates, does she not refrain from praying and fasting?” They > said: Yes. He said: “That is how she is lacking in religious > commitment.” How can women and men be equal in reward and punishment, when this 'natural lack of religious commitment compared to men' means that women get the short end of the stick by way of their creation, and that it is easier for men be more 'pious'?