There isn't any difference. Just the springs are matched and color coded for different weights of
DSG/non-DSG and 2-door/4-door.
I wish they'd have spent the ED30 and Pirelli an uprated suspension with stiffer springs, dampers,
top mounts (like Cupra, RS3) and bushings (like Cupra, S3, RS3), but they have not.
If you really feel a difference you feel different tyres, different tyre pressures, different tyre wear
and suspension wear.