Don't confuse Performance Pack with Performance Pack Plus.
Simple way to tell is for the OP to post a pic of his engine and the rear underside of the car.
Perf Pack was a 2008/2009 special with LSD, 2 piece front discs with red callipers, 1/2 alcantara steering wheel and the stiffer suspension. Engine was 457bhp.
Perf Pack Plus came in 2010 and went on through the facelift to 2013 (maybe a couple into 2014). This had 487bhp engine with a different colour intake cover. It also has SLS engine bits and some other shiz. The LSD became an option and the 2 piece discs became uber-pricey composite castings (ali-steel) with red callipers. Steering wheel was still 1/2 alcantara and the boot lid also has a carbon lip. Stiffer suspension was now an option and is incredibly rare due to already crashy ride on 19s.
Otherwise there are very few differences. Many owners of standard cars had callipers painted and boot lips fitted so don't use this as a guide. Engine cover is definitive. Steering wheel is nearly as good a marker. If your car has an LSD the rear diff will have cooling fins on the housing.
Oh, one last thing: Why the hell did you not research this before purchase? These options are currently the difference between slow depreciation and slow appreciation. PPP cars are heading north on the 2nd hand market and with the right options they are a great invrstment. A standard car won't lose you a lot of money but there are million of them out there, which begs the question of research.
Anyway, lets see and engine bay pic and I'll put you out of your misery.
