ANSI is US layout while European use ISO layout. Here's a nice comparison:
http://www.keybotypo.com/wp-content/uploads/2016/09/ISO-vs-ANSI-min-1024x487.png Look at enter key and left shift especially. The set you linked looks like it has extra keys to fit both ANSI and ISO. The set I linked seems to have both type of enter keys, but only the wide ANSI left shift so it might not fit if you have a Swedish keyboard.
Also, in case you didn't know PBT is the type of plastic some keycaps are made of, the alternative is ABS which will get shiny after heavy use.