I have read a few comments over the years that the Jap version was suposed to be technically better than the US version.

All I can find for the 1994 version is.....

Unlike the US edition, the commentary track on this edition is isolated to Channel 2/R. This allows the film soundtrack to be presented on Analog Channel 1/L - maintaining compatibility with all LaserDisc players.

and the 1995 version.....

The commentary track on this edition is presented in the original English on Analog Channel 2/R. and in the Japanese translation on Analog Channel 1/L.