Williams books look similar (in graphic design) in each and every country they have been published – maybe it’s an early example of a cross-country publishing venture?
I have seen danish, german and italian ones are very similar.
I think it was one main publisher that printed Sweden, Finland, and Norway as the formats were very similar. My Superman 233s from there are exact in format other than the language
I still get confused on a few of my Batman 423s so i marked the back mylars. The Denmark, Norway, and Sweden editions are very difficult to identify
I call these the cold foreigns.