Just my imagination, but in my head the concept that hell and heaven borders each other was a bit far fetched. With ‘and’ to me it feels like two are a gradient. With ‘or’ its different place or room, and not knowing if you are in one or the other without seeing the other, while understanding neither is a good place to be.
Guess it doesn’t matter over all, the main point is same with both.
Why does the cat have Charles’ headphones? What are they planning?