Patreon version has an additional storyline set after the lab assault in which we follow the villain's perspective. It's short for now, but gets expanded between the big updates. (Patreon version also comes with good feelings for supporting a small Indi-Dev as a bonus 😇)
Apart from that Patreons get early access to new builds sooner. We're still releasing the main storyline for free, as I don't want to exclude those who can't afford supporting the game entirely. Culture should be freely accessible after all. 😊