Just read erWin Service manual
Here is the summary of the difference of US and Euro GTI suspension
Camber: -30' +/- 30' (US) vs -44' +/- 30' (Euro)
Toe Out (at left and right lock) : 1deg 38' (US) vs 1deg 22' (Euro)
Caster: 7deg 34' (US) vs 7deg 47 (Euro)
Ride Height: 382mm +/- 7mm (US) vs 360 +/- 7mm (Euro)
Camber 1deg 20' (US) vs 1deg 45' (Euro)
Actually the US GTI has the same setting as the non-sport Golf in Euro.