I received PHS documentation on both my cars and they are very accurate. The only difference is someone installed wheel opening mouldings on the convertible - probably the dealer.
Jim Mattison does a great job keeping track of all the Pontiac data. Be thankful you can document your FGF by just having the VIN. If you had a Camaro and did not have a build sheet, it would be pretty hard to document factory options because the records are not available.