@Tristan Do you happen to know if the PAL version is slower?

I honestly don't know, I've never had PAL. I know the Chinese version for Xbox is faster than GC though.

So I've taken a look at your WR and my current PB on Stage 15 (Control Deck) and NTSC might be slightly faster, but it's hard to tell. Could you also take a look to see if you can confirm/deny?