Sydric's Journal: Which Zelda is better?

With Nintendo's Virtual Console feature I can download and pay for the original "Legend of Zelda" on my Wii. Here's my question though: I own the special Zelda's Collector Disc that came out for the Gamecube several years ago (in fact, that's how I played through Ocarina of Time, I never had the time when it was out on the 64) and included on this disc is the original Legend of Zelda. My question is: Since I can play that disc on my Wii (and I've tried it, works fine) should I just play the original Zelda on the disc or should I pay for the VC version? Which is better or are they the same?