I only have the 6-disc US box so cannot fully compare, but I can confirm that all the films except THE DEAD POOL are in 2.35:1 widescreen (THE DEAD POOL is in 1.33:1 - Full Screen). The documentary, THE MAN FROM MALPASO, fills an entire disc side and runs for an hour. Also Side 5, which has the ending of MAGNUM FORCE, is in CAV and is followed by trailers for all 5 films. You might also want to know that, although all the films are in Stereo, only THE DEAD POOL is in Dolby Surround.
The box is pretty smart, too. And, of course, there are no Japanese subtitles!
Hope this helps.