I didn't vote, because I don't believe it actually captures the real differences.
1) I would actually be surprised if Nintendo's offering is significantly cheaper. 4-5 bucks is what you pay for classics on Xbox Live. This is as close to "ring tone" fee as games will likely get. But even if Nintendo charges 2-3 dollars, it's really insignificant. Unless "free" is the price, cost shouldn't be a differentiating factor.
2) Is everyone who voted for "keep it the same" saying they don't want online co-op or online versus? Graphic enhancements aside there are other enhancements that make it "better" such as online leaderboards, achievements, and online play.