i recommend r8 eng version, i have tried both and ive picked eng in the end... there are several reasons:
- there is so much content in both versions that you will genuinely be never done with it
- slowly but surely the eng version official is creeping to the same content level as the jp version
- jp version loads much more slowly, and im using a ssd here
- all mods for this game that matter come with CMI which is compatible with both versions
that said CMI will uncensor and translate the jp version... if your concern is solely wanting the most content and you can stomach the massive 250gbs the game will absorb off your storage drive, go for jp version otherwise eng version is good enough. Just as a warning, the R8 ENG comes packed in zip files, it will unpack into 150gbs.