Concrete Material looks different at different faces of the same object

Hi there

I have a question regarding the concrete Material I applied on the back wall of the house. While the faces at the top or at the left hand side look pretty clean and smooth, the face at the back wall looks rather rough and has much more dents and cracks. At UV Editing one can see, that both faces cover exactly the same area. So I guess they should actually look the same? How comes, they don’t? How could I apply the cleaner look also to the back facing Face, or alternatively, the rougher look also to the other faes, if needed?
No Normal Map is attached and the difference is noticeable in Material Preview Mode.