Just comparing part numbers on ETOS, the 'wheel bearing housing' which all the arms bolt to is a different part number (with a larger stub axle diameter) and the lower arm the spring sits is also a different part number.
Pre facelift are;
5Q0505435F and 5Q0505436F on the wheel bearing housings
5Q0505311C on the lower arms
Facelift are;
5QA505433B and 5QA505434B on the wheel bearing housings
5Q0505311D on the lower arms
The trailing arm (5Q0505223D/5Q0505224D), track rod (5Q0501529C) and upper arm (5Q0505323C) are identical on pre-facelift and facelift, as are the wheel offsets (ET51)
Wheel bearings appear to be the same 'height' so it's them.
Obviously unless you put them side by side, it's difficult to be certain that this is how they've done it but there's nothing else at all which looks to be different between the two.