The whole point is that the framework is already there but the rules are gone. Stephenie Meyer gave us a world, but she also gave us a canon ending and a set pair of central relationships. On Wattpad, that's just the starting block. People take the vibe—the Pacific Northwest gloom, the supernatural politics, the intense romantic tropes—and run in a hundred different directions. You get 'What if Bella was the vampire and Edward was human?' or 'What if the Cullens were in the '80s?' It's less about recreating the official story and more about using its emotional language to tell completely new ones. The prose style is also a massive shift. The books have that very specific, deliberate, almost formal internal monologue. Wattpad stories can be text message fics, or super lyrical, or just raw and messy in a way that feels immediate. It's the difference between a produced album and a live basement show covering the same songs.
The unique flavor comes from that total freedom. No editor, no publisher expectations, just pure, unfiltered 'what do I, as a fan, really want to see happen?' Sometimes it's self-indulgent, sure, but that's where the fun is. You stumble across a story where Jacob imprints on Leah instead, and it completely reframes the entire third act conflict in a way the official material never could.