I have a few of each. They are not US spec. The only thing they have in common is the color of the case. The circular stamp on the inside of the case has the arrow pointed to "MULTI", while the US consoles have the arrow pointed to "USA" (Japan points to "JPN" and Europe points to "MULTI"). Samsung consoles are set to region code 2 (Asia NTSC) and has a unique wide-voltage psu that takes 110-220v, and also a unique bios that disables the Japanese language setting when the console is set to region code 2. The Kama consoles are set to region code 1 (Japan) with a 220v psu. I think by 1998 most of the country had already switched from 110v to 220v so there was no need to support 110v. Also the Kama motherboards have a "K" printed with white circular dots.