These two terms begin the title of a 2020 LARB essay by Hope Wabuke that posits that their “main defining difference” is the way they center themselves around “the concept of 'American'.” For 10 points each:
[10h] Give these two terms for approaches to a certain cultural aesthetic. The newer of them was coined by Nnedi Okorafor in part as a replacement for the older, which is attributed to white critic Mark Dery.
ANSWER: Afrofuturism and Africanfuturism [accept answers in either order; accept word forms; prompt on partial answers]
[10e] Wabuke's essay also considers the umbrella term “Black Speculative Literature,” noting that the original term “speculative literature” is attributed to this “problematic” author of Stranger in a Strange Land.
ANSWER: Robert A. Heinlein [or Robert Anson Heinlein] (n.b. quotes around “problematic” are because it's a direct quote from the essay; Heinlein had complicated and thorny views on a lot of issues!)
[10m] Dery coined the term “Afrofuturism” in the essay "Black to the Future," which includes an interview with this gay Black author of Nova, Dhalgren, and Babel-17.
ANSWER: Samuel R. Delany [or Chip Delany]