The original Famicom had the Family Computer Disk System add-on released for it a few years after its release which allowed playback of games on higher capacity discs. These discs commonly featured enhanced sound capabilities and the ability to save the game data, as opposed to using passwords to resume progress. Since the NES had a delayed release, it included additional mapping hardware negating the need for the add-on, albeit without the sound enhancements. Many Famicom disk-only games were ported to cartridge form for their US release. The default theme, Carbon, supports switching between regions in its theme settings in the case that you'd prefer to see the Famicom design instead of the NES design on the system list.