I don't know. I know the english VO sounds a little cheesy, but I have to guess the JP VOs are just as cheesy, but you can't tell if you can't speak JP
I wish it was like SSF4 where you could choose different languages for each character. I like Ryu's JP more than ENG, but I like Bayman and Rig's ENG more than JP, but I like Leon's JP more than ENG...