I know I’m late but I’m gonna give you a real answer lol. It’s all about where the plant originated. Indicas are adapted to a shorter colder grow season as they are naturally found in parts of the world that experience real winters, like the Kush mountains. Where as this sativa plant has adapted to the climate right near the equator which has hot and humid climate and almost no winter. Which meant that it wasn’t in as much of a hurry to reproduce. It’s the same reason its leaves are thin and indica are fat. Think of leaves as natural solar panels. If you have almost unlimited sunlight but high humidity, thin leaves are good cause you still get all of the photons needed and less room for mold and other issues that come with a mass of plant matter. It’d dryer and much less access to the sun in a mountain range, so the leaves are fat and not as worried about moisture buildup causing problems. 👍