A decorative finish is not a printed pattern. Its depth changes with the angle of application, the pressure of the hand, and the proportions of the wall receiving it.
That is why samples are reviewed inside the room. Morning light may emphasize movement while evening light quiets it. The surrounding flooring, furniture, and ceiling color change the surface again.
The goal is not to force two rooms to match. It is to let the same material language respond correctly to each one.