I did play the WiiWare game, and this sequel is just in another league. The pacing, the mechanics etc. are here all much, much better. The orbs and phasing are really fun here, whereas they were annoying in Racing League. And in visuals/sensations, it's completely something else.
Some things look a little cheap though, like trees are just 2D sprites, but while you play, you really don't care. The gameplay is just pure fun and speed sensations. Even my boyfriend is having a blast.
Honestly, at this point (I may change my opinion later), I'm having more fun than with F-Zero GX. GX was obviously a better game, but it was really stressful, here the rule and mechanics suit me a lot more.