How do you go about jumping from something like Stormlight into a science fiction instead, of something like Skyward?
This is an interesting question for me because, as a writer, I don't look at genre trappings perhaps the same way that you might. I look at story structure and genre trappings as two very different things. Two very important things, but two very different things. And story structure is different.
For instance, the Bridge Four sequence from Way of Kings and the movie Hoosiers and the book Ender's Game are all what we call underdog sports stories. And those are three different stories in three different genre trappings. Modern-day, science fiction, and fantasy; and yet all three of them use the same plot archetype as the core of their story. And you'll find, for instance, that a buddy cop movie and a regency romance will sometimes use the exact same plot archetypes, despite being different subgenres. And so, as a writer, one of the things we do is we start to learn to divide plot archetype, character archetype, genre trappings, and all of these things to build the story that we want to with the feel we want to.
So that's kind of like, when people ask me, "Star Wars. Science fiction, or fantasy?" Well, it's a fantasy plot archetype. (Really, it's a western plot archetype, but they both use the same idea.) The plot archetype is fantasy, it's the hero's journey epic; and the genre trappings are science fiction. So I would place it in science fiction, but with fantasy underpinnings.
So when I'm moving from Way of Kings to Skyward, it's not so much about how the shift between fantasy versus science fiction is. Really, the things I'm looking for that are the big shift are: a narrow focus on one character, versus a wide focus on a large cast. That's the biggest difference for me. Also, the kind of setting-as-character in Stormlight Archive, where you're going to get to know this deep setting, versus setting-as-mystery, which is the setting archetype I'm using for Skyward. We don't know what the enemy is. We're trying to figure out what's going on. We don't know our past.
So those sorts of things, I look as very differently as a writer than I think maybe a reader might look at them.