The "premium" body change didn't happen until 2012, looks like a platinum on the outside but with a body matched grill and door handles instead of chrome and has the Platinum rear bumper with smoked tail lights. In 2011 it just looked normal.
2012+ Premium (with the LED headlight option, this was standard on Platinums, optional on Premiums)
I have a 2013 Premium and a 2010 EXT with a Premium front end, it's very much worth the upgrade visually!