I am not sure it is the same effect here. The other houses often showed signs of varying time periods; here the craftsmanship involved is all of a similar level, and has about the range I've seen in some particularly opulent palaces.

The Lord and Lady do not seem to reside in them; my guess is that those are likely rooms for visiting dignitaries and other guests they would want to impress. I've seen a few palaces in my world where someone with enough wealth who wanted to leave an impression would have individual rooms in such areas that would be built around some particular theme of decor - different tales from individual operas, for one example - so that they would vary widely while still retaining similar craftsmanship.

Which does seem to fit the claim of one resident here who has said in this journal that the castle was moved in one piece from elsewhere, similar to the chapel and the half-built house before.