In my experience, pal is european and ntsc is americas and japan. 50hz pal 60 ntsc. This was the case in alot of games. There is a small slow down in pal format but not that much. And it's nothing to do with frame rates. The frame rate as far as i know is the same for both formats. NTSC is just a higher resolution. (Don't quote me on that though) seriously though, not that much difference.
Also i have heard that ALttP on the vc is shorter than the original snes version. More like four swords on gba.
