The answers:
- Builder at left has hired an architect; builder at right has not.
- Door in left-hand picture is closed; door in right-hand picture is open.
- In left-hand picture, villain gets the girl; in right-hand picture, hero gets the girl.
- Time in left-hand picture is 8 a.m.; time in right-hand picture is 8 p.m.
- Wallpaper has changed.