Differences are:
HIDs, which you will be able to tell it has them by having headlight washers on the front bumper and they are auto leveling so no headlight adjustment on the dash. It does have a spray button though.
IPod connection as standard in the centre arm rest, though this was an option on pre-facelift.
The non-GT model was dropped as was the colour Deep Pearl Bronze. Deep Sapphire Blue colour introduced.
Nighthawk Black replaced by Crystal Black Pearl in early 2010.
Further revision in April 2010, where all cars built in April or after have an LSD.