Compare Antigone and Ismene. Simply put - how are they similar? How are they different?

Antigone and Ismene are similar because they share the same beliefs and values, but fundamentally they are different because Antigone is willing to act on those values while Ismene is not. Antigone takes a risk in burying their brother, but Ismene (even though she believes he should be buried), refuses to go against Creon's orders.