Oh totally, I wasn't intending to imply a complete reuse or anything about the layout being completely similar, more so that at this point they've more than likely got it down to a science when and where in the house flow they can place the "showstopper" scene (from a scale standpoint)
To
@Clive's point too, while I never experienced House of Horrors, usually when they've reused room layouts in the past it hasn't been toooo obvious, and is typically dressed well enough/modifications are made to cover any similarities. The only house it genuinely took me out of and made me go, "Huh...this was kind of a cut and paste" the first time through (the other runs I just shut my brain off, haha), was Scary Tales/Universal Monsters with the mirror dungeon. From a cost standpoint though I totally get it, that maze must not have been cheap at all, and it honestly works well from a story aspect in both cases so no harm no foul. Anyway, that was largely off topic, I apologize!