The Famicom came out in 1984 in Japan, it is shown on the right,
The Nes came out in 1985 in United states, It is shown on the left
Both consoles are made by Nintendo, they have the same games, although Japan has around 30 more games than Nintendo of America has, the Nes cartridges are Way bigger than the Famicom cartridges, the Nes cartridge is shown on the left inside the system on the left, the Famicom cartridges are small around 1/4 of the nes cartridge.