Well, blow me down, stuff I never knew:
Vs. Super Mario Bros.One alternate version, Vs. Super Mario Bros. ,[29] is nearly a separate game in its own right. This game, one of several games made for Nintendo's NES-based arcade cabinet, the Nintendo Vs. Unisystem (and its variant, the Nintendo Vs. Dualsystem), is based on Super Mario Bros., and has an identical format. The stages, however, are different; the early stages are subtly different, with small differences like the omission of 1-up mushrooms or other hidden items, narrower platforms and more dangerous enemies, but later stages are changed entirely. These changes have a net effect of making Vs. Super Mario Bros. much more difficult than the original Super Mario Bros.[30] Many of these later, changed stages reappeared in the Japanese Super Mario Bros. 2.
As with many older arcade games, it is unclear exactly when this game was released; while the arcade boards themselves are stamped "1985",[31] the Killer List of Video Games, the title screen, and the MAME game listing list the game as having been released in 1986.[32]
[edit] All Night Nippon Super Mario Bros.All Night Nippon Super Mario Bros. is a very rare version of Super Mario Bros. with graphics based upon the popular Japanese radio show All Night Nippon. The game, which was only released in Japan for the Famicom Disk System, was a special promotional version that was given away by the show in 1986. The creators altered the sprites of the enemies, mushroom retainers, and other characters to look like famous Japanese music idols, recording artists, and DJs as well as other people related to All-Night Nippon. They also used the same slightly upgraded graphics that Super Mario Bros.: The Lost Levels used. It was published by Fuji TV, the same company that published the game Doki Doki Panic (which was later modified into the Super Mario Bros. 2 that was released outside Japan).[33]
Instead of being a straight port from Super Mario Bros. with graphical changes, All Night Nippon Super Mario Bros. combined variations of levels from Super Mario Bros.: The Lost Levels and Super Mario Bros.
[edit] Super Mario Bros. SpecialSuper Mario Bros. Special was a game released only in Japan by Hudson Soft for the NEC PC-8801[34] and Sharp X1 computers in 1986. Although it has similar controls and graphics, there are new level layouts and the game scrolls in a different manner than the original game (differing based on the computer). In addition, many new enemies are included, including enemies from Mario Bros. and Donkey Kong.
On the NEC version, the game goes at a greater speed, meaning that the timer drains more swiftly. The Sharp X1 version has a speed that is much closer to the original game. Neither version features Luigi or a two-player mode.
From Wikipedia