If your not a super Super Mario player, you won't enjoy this as much as you should.
The Lost Levels is simply a harder version of the previous game, identical in terms of levels and story.
While the western Super Mario Bros. 2 is just Doki Doki Panic but with Mario sprites slapped on instead of the original sprites, the game was so blatantly NOT a Mario game, right down to the vegetables and distinct Arabian setting.
But when it boils down to choice, I believe that The Lost Levels is a mroe suitable followup to the original Super Mario Bros.
Graphics:
Exactly the same as the original except for a few different textures, the ground for instance. Still good though.
Sound:
Identical to the original to an almost sadistic sense. But it makes you feel as if your playing an additional world in the original Super Mario Bros..
Gameplay:
If you enjoyed the original, you'll enjoy this, but if you didn't play the original very well, then you might not get the most out of the game.
Value:
Well if you haven't downloaded it now, you've missed your chance, but at 600 Wii Points (100 points more dear than other NES games), you may feel a little skanked, but this is the finest the Hanabi Festival has brought us.
If your up to dishing out an extra 100 Wii Points for this limited offer, you should buy it, without hesitating.