The correct comparison of the rhetorical devices used in the passages is:
Ain't I a Woman? employs a rhetorical question, while the Declaration of Sentiments uses anaphora.
In "Ain't I a Woman?", Sojourner Truth uses rhetorical questions to emphasize her argument about the equality of women and African Americans. In contrast, the "Declaration of Sentiments" employs anaphora, particularly with the phrase "that all men and women are created equal," to drive home the point of equality for both genders.