I get one with the roof as the one in the last picture. It is very clean casting and has good detail in the exterior. No bubbles or imperfections at all.
The interior is flat, with details in the floor (tiles) and walls with the interior windows sculpted. They say it is easy cut the windows off, but I disagree a little. The walls are thick and I think it would be as easy to cut them respecting the frames (at least for me

).
Each floor is separated. Perhaps I would like a little more height at each floor.
I think it is a good purchuase and I am a happy buyer.