I have two A Hat in Time AUs with completely different lore but identical casts. Since I've hardly shown any characters appearing in either, I've assigned numbers up to 76 for every character who's actually slightly important to the cast. Pick a number, and then decide which AU of that character you want.
There's the Lost Fawn AU, which mostly focuses on the primary lore of each character through progression, and then the Forgotten Lights AU, which focuses more on the current story rather than the past. Note that Lost occurs in a timeline where the Prince was brought to the present, discarding the Snatcher and messing up the timeline, whereas Forgotten occurs in a timeline where the three rulers of Subcon(Moonjumper, Snatcher, and Vanessa) are at war, like they were in the alpha/beta lore. The discarded lore is scarcely mentioned in Forgotten.