Yo, I have played both these versions now for a bit, have not tried out PAL yet. I believe that the Wii version does not have any significant differences but I am not sure - if you play Wii just try both out. NTSC-J has a few stages where the attack modifier is higher for the stage and NTSC-U has one stage where the attack modifier is higher.
The main differences I've seen so far are as follows (NOT SURE ABOUT ALL STORIES STAGES):
Also note that the approximate time saved for these is based on my times and my strategies (check twitch.tv/yamini981 for my runs)
NTSC-J has the following stages faster: (TOTAL TIME SAVE ~40-45 seconds) Ultimate Decisive Battle (Goku Early vs. Vegeta Scouter) SAVES ~5 seconds Frieza's Ultimate Transformation! (Frieza vs. Vegeta Scouter) SAVES ~ 15-20 seconds Vegeta's Curiousity (Semi-perfect Cell vs. #16, SS Trunks, Android 18) SAVES ~20 seconds
NTSC-U has the following stage faster: (TOTAL TIME SAVE ~50 seconds) Conclusion SAVES ~50 seconds
It seems from this that the version you should play on depends on your strategy/playstyle. For you, you may save a lot more time on the NTSC-J stages with the extra damage you get. The conclusion being longer seems a bit too much for me and I think I'll probably stick with NTSC-U as I was doing before, however I will try out NTSC-J for a few days to see how I like it. Overall though I would recommend using NTSC-U especially for newer players considering how much of a run killer Conclusion can be when you don't go for the spirit bomb. For world record? Hard to say - play with your preference imo.
It's also possible that there are other differences I may have missed out on, so if there are please let me know.
also mods verify my run >:(
EDIT: I lied I don't feel like playing NTSC-J cuz I prefer having time to save later in the run rather than making it up earlier. I still stand by it being up to preference though and I don't think a leaderboard divide is necessary.
The significant difference between the PAL version and the other versions is just the frame rate that stays at 25 Fps in fights and gives the impression that the game is running faster because this version uses FrameSkip by default in both the PS2 and Nintendo Wii versions
