Note that this post is linked to my gameplay report of Beatmania IIDX on the same days. Blog post to that is right here.
Okay, the difference between those two Sound Voltex machines is that one of them has the coin slot in addition to game card reader for credits. Somehow in May 19, some player forgot to bring his own game card so I guess that it was his turn after going through but I was already finished with the game by then.
The remaining goal will be to attempt the songs from Sound Voltex IV.