My wife is very observant. She was the first one to notice the different outlines on the numbers. Tonight she additionally noticed that the actual artwork on the tiles are different between the player sets. We could deduce what city 3 of the 4 sets correspond to, can anyone help out with the last one?
Circle = New York (Statue of Liberty / Brooklyn Bridge / Chrysler Building) Hex = Paris (Louvre / Eiffel Tower / Arc de Triumph / Notre Dame) Square = London (Big Ben / Millennium Wheel) Diamond = ????
I think this raised the cuteness factor a good 10x fold.