The GLI is exactly like the GTI except based on a Jetta except a golf. The biggest differences are the optional DSG; only GLIs get the DSG the SE is a standard auto. The 07+ GLIs get launch control too. The interior in the GLI is exactly like the GTI and the front end looks exactly like the GTI too; w/ the red lining around the black honey comb grill. The GLI's get sport rubber too. Suspension is stiffer; w/ less body roll in the corners and a harsher ride.