I'm fairly confident there has never been a KF demo. ASCII/Agetec are not licensed as "developers" - only "localizers" so they would not have the legal right to create their own KF demo. And I'm pretty sure if Fromsoft made a demo, I would have heard of it by now. I actually don't know of any demos for Fromsoft games from that era.
The EU version of KF has a French/German language option, had a different "demo" video from the US, and had german/french endgame videos. Other than that, the two English version are the same as far as I know- the EU version even has the ASCII logo video on the disk.
The EU version of KF has a French/German language option, had a different "demo" video from the US, and had german/french endgame videos. Other than that, the two English version are the same as far as I know- the EU version even has the ASCII logo video on the disk.