The new DFI non-Metzger-engined cars have a deeper growl.  Face it, at this point what is sound engineered is for, at best, aesthetic and, at worst, marketing rather than performance purposes. I for one would pay for the higher pitched wail that my old Boxter S RS 60 Spyder PSE provided- I also prefer the look of the center dual pipes over the 4 fake outlets on the S. But not so much that I would trade for a GT3 JUST for that.