I like both, but I've always leaned toward science fiction myself. I have an easier time finding deep and thought-provoking stories in the science fiction genre, and I tend to prefer its more emphasis on exploring what its possibilities mean and using them to examine ourselves.
where does primer fit in this?
If we're buying this binary, I'd say more in (2). The movie's big focus is on the process stuff surrounding discovery and engineering, and almost all the protagonists' trouble comes from their irresponsible and reckless misuse of a new technology (as well as interpersonal conflict), rather than because of anything intrinsic to the technology itself. I think you can read it as a kind of argument for technology being "neutral," and the moral valence of tools coming from the reactive attitudes and use-behaviors of intentional agents.
That's a good callout. And as the maker of this very spur-of-the-moment binary, I'd agree that speculative fiction built around how people would react to $shiny_new_tech_or_magic falls under the broad category of allegory. I suppose I should rename that category something along the lines of "lens we view the real world through" instead.