ND Eibach spring specs

It would appear that the US and Euro eibach Pro kit springs are different. The part numbers are different and US spec springs quoted as dropping the car 5~mm less, US 20-25mm Euro 25-30mm.  Are the spring rates any different and does anyone know of where to get US spec springs without having to pay £100+ postage?

Maybe from here: https://eibach.com/de/en/content/eibach-uk 

Well you would think wouldn’t you, but they only list the European part numbers. I did ask Eibach if they had different spring rates but did not get a reply.