On: A Pixel Artist Renounces Pixel Art (2015)

[wodenokoto]

It is worth mentioning that there was a clear visible difference between NTSC and PAL, so even on the same screen, playing the same game, things would look different in Europe and America (and I believe also in Japan)

[mikeash → wodenokoto]

Not just look different, but sometimes play differently too. Game mechanics were often tied into framerate, so 60Hz vs 50Hz could make a difference.