different tires between base GT and PP GTI don't believe that to be the case. The very first Car and Driver tests I checked had the performance pack stopping at 149ft. vs the standard brakes stopping at 157ft. from 70MPH. The Brembos will be worth 6-8 feet in stopping distance.
No mycolor either, and that is one of the biggest trivial sells to mei could never deal with the base stereo... it looks like crap
no driving modes
no pony from side mirrors
go all out bro