Is there a difference between PAL and NTSC roms?

[Sidrack]

Someone posted today...

(06-01-2009, 06:10 PM)zezoman Wrote: Just want to recommend the PAL version to the other RE fans .
In my experience with those 2 games they crash more often, have buggier sound and more missing ingame music in the NTSC version.

I guess they would be the only two games that run better on PAL than NTSC?