Hi!! Hazel and Jace will continue to have different stories/perspectives like in the demo. So Jace and Stephanie have a completely different storyline and romance development than Hazel and Stephanie. :)
Viewing post in Cameron's Beta - Out Now! comments
The subscription rewards stated under the Patreon tier are the only rewards our patrons receive and you only have access to those rewards for the month (or months) you’re subscribed. Currently, the final version of the game isn’t one of those rewards, I’m afraid! You’d have to purchase the final version of the game when it comes out if you want the fully polished, final release. That said, with Steph’s upcoming beta update, you’ll be able to play the full main game story – minus some missing art assets and some last polish for the final game release.