Final answer:
The memoir uses a metaphor to describe the inspiration for Travis Smith's writing, while the biography provides a factual account of his influences without metaphorical language.
Step-by-step explanation:
The main difference in the way the two passages use a literary device is that the memoir utilizes a metaphor to describe Travis Smith's inspiration, while the biography gives a broader perspective on Smith's journey to becoming a writer. In the memoir, Ms. Washington's storytelling is described as planting seeds that would later become books, which is a metaphorical way of showing how Smith's imagination and interest in storytelling were nurtured. In contrast, the biography directly attributes Smith's storytelling techniques to family friends, without the use of a literary device like metaphor, indicating a greater emphasis on factual recount and less on figurative language.