Saturn Demo Disks

What do the following Saturn games have in common? Burning Rangers, Panzer Dragoon RPG Azel, Saturn Bomberman Fight, Solo Crisis, Sonic R, Soul Hackers/Ronde and The House of the Dead... Well they all have a demo disk released for them for the hardcore Saturn fans who want the ultimate collection. Pleasure can be had from comparing and contrasting against the original release to see where changes were made... But also from the brief sample of the game. Hope we don't get too much stick for launching collectors off again when they just thought you'd completed the collection...