Original iteration of the SMB Game & Watch.
About the same but with less Mario esque visuals. I appreciate the dedication to the consistent 'Game & Watch' look for the characters, but I think I prefer how the later iterations of this handheld look.
That being said, I don't think the gameplay is different enough to dock off anything substantial in terms of score, especially since this one is still pretty charming in it's own right.
See my other Super Mario Bros. Game & Watch review for thoughts on the gameplay proper.