Funny song parodies - which speed is better?

Hey guys,

I started making musical song parodies and I'm wondering if these work better when done in normal speed, or when you speed them up a bit, so that the singing becomes a bit cartoonish and 'south park' like. What do you reckon?

For example, my parody for Sandi Thom's 'I wish I was Punk Rocker', entitled 'You wish you were a Full-time Drunk'.

Here's a cartoonish version: http://www.youtube.com/watch?v=HQr2QimlVYA
And here's a normal speed version of the same song: http://www.youtube.com/watch?v=lEjoup5N1t0

Which one do you reckon works best?

Thanks so much!

Cheers,
FunnyOddSongs.