Car and Driver reported 0-60 in 4.7 sec for the G8 GXP.
That's the exact same as reported for the Camaro in many reviews.
Same exact engine - same exact platform - the numbers are almost exactly the same.
(I realize weight is diff but so is gearing)...
To me it's a wash!!
Oh and the Camaro LOOKS about a BILLION times better than any G8 ever could...