Buy the second one. It's so much better.
Graphics- 4/10
Bad. The sprites are simple and some, like the koopas (or whatever they call them in this game) are way too small.
Gameplay- 7/10
Ah yes. That's more like it. The only problem I have is the fact you can't go backwards.
Sound- 8/10
I like the tunes in the game. They are pretty catchy.
Value- 6/10
It's a game you'll replay once you've completed it.
You should buy the second one first. Then, once you've played it, ask yourself if you want a downgraded version of it with bad graphics. If the awnser is yes- buy this. If the awnser is no- then don't.