I agree, the Performance Pack on the '13 is worlds apart from the stock setup on the '12. For the money I couldn't ask for much more out of the OEM for a handling upgrade. It would have been nice to see a set of lowering springs in place of the GT rate springs but I can't complain still a lot of fun.
2013 V6 Base Performance Pack - Stock..... for now
2012 V6 Premium - GT front swap..... more to come