Just happened across some information from an old member on this site. I thought I would share it to
help future generations.
All the springs are basically interchangeable, they will just have different heights and spring rates depending on year of manufacture and engine code, that sort of thing.
So some springs may say they fir the 1.9tdi but they could well be 20mm shorter ones that come on the
cupra r as standard, so you could essentially get a stiffer 20mm
lowering spring, OE, for the same price.
They seem to go from about 336mm height to about 362mm, I'll be going for the 362mm