Is there any difference between the U.S and JP versions?

I kind of noticed the fact that at mission 6 when you use a mega crash to bypass the first electric barrier I don't have enough IF's for the second one. For some reason, Capcom only put out the JP ROM for the Capcom Arcade Stadium and no ENG ROM.

I have succeeded in doing it in the past, but I wasn't able to do it again.

Also, is there any info on the game's weapons if they're stronger or weaker between the two? Any info would help.