🚀 go-pugleaf

Nope: it is not necessary for cities to match.  Consider a scale map the
size of (say) a football field.  Now consider one the size of a pinhead.
(There are computer circuits sufficiently complicated that a level of
detail this fine can be assumed)

Now you must realize that there is physical space between the cities:
the United States is not one gigantic city.  Place the pinhead-sized
map in a space between cities on the larger map... then no cities can
possibly match.

This is not the same problem as a POINT matching another point on each
map, where we have mathematically that some point coincides.