I know that the reason why the North American resistor symbol is just squiggly lines because that is how the electrons flow (due to the way how resistors are made), but why is the European resistor symbol a box shape. Also there is a reason why capictors have two lines seperated, but why does one valid schematic symbol have a curve? For integrated circuits, the pinout given in datasheets match the physical layout, but some schematics editors have multiple ways to represent one integrated circuit? Can someone explain that?

I know that the reason why the North American resistor symbol is just squiggly lines because that is how the electrons flow (due to the way how resistors are made), but why is the European resistor symbol a box shape. Also there is a reason why capacitors have two lines separated, but why does one valid schematic symbol have a curve? For integrated circuits, the pinout given in datasheets match the physical layout, but some schematics editors have multiple ways to represent one integrated circuit? Can someone explain that?