Apparently the port of Samurai Shodown 5 on Xbox (not 360) is really just an emulated version. The 68k has been massively changed, the palette data has been moved and needs to be mapped to a separate memory space (0x150000-0x17ffff), the sprite data is in chunks with table offset data telling the emulator where to get the chunks from and is completely de-scrambled. And the text rom is completely descrambled too, but matches the mvs version 100% when rescrambled.
I wrote some tools to recombine the sprite data and then put it in a format that will work in an emulator.
According to JackC, it has a couple of extra characters and story mode.