As both versions only have differences between the sprites, with the Japanese version having a tengu mask belonging to Japanese folklore, the US version has major graphical and story changes, replacing the tengu mask with the decapitated samurai head.
The US version has major graphical and story changes. Major graphical and story changes are replacing the tengu mask with the decapitated samurai head. Both versions only have differences between the sprites. This is with the Japanese version. This Japanese version is having a tengu mask. This Japanese version is belonging to Japanese folklore.