The Witches in Macbeth and the Oracle in Oedipus Rex share some similarities and differences.

Similarities:

1. Both the Witches and the Oracle provide prophecies that drive the plot of the play.
2. Both prophecies are cryptic and require interpretation.
3. Both prophecies are fulfilled in unexpected ways.

Differences:

1. The Witches in Macbeth are portrayed as evil and manipulative, while the Oracle in Oedipus Rex is portrayed as a divine source of knowledge.
2. The Witches in Macbeth are not specific about the details of their prophecy, while the Oracle in Oedipus Rex is very specific about the details of its prophecy.
3. The Witches in Macbeth provide a prophecy that leads to Macbeth's downfall, while the Oracle in Oedipus Rex provides a prophecy that leads to Oedipus' discovery of his true identity.

Overall, while both the Witches in Macbeth and the Oracle in Oedipus Rex provide prophecies that drive the plot of their respective plays, they differ in their portrayal, specificity, and ultimate outcome of their prophecies.