My money is still on it being more Psychoscareapy Unleashed just based on the Fall Festival setting. Plus, the actors in that wore Halloween costumes, so that seems a more apt comparison.
That was also not a dystopian/post apocalyptic future so it lines up cleaner from a sets/soundtrack standpoint too.
There’s more to a zone than just the character’s costumes.
Personally, the more it resembles Psychoscareapy, the better as thatzone was hugely interactive and fun.