Not guilty. Interested, is my perspective. I forgot about the sunroof.

The GT has subwoofers already. Minor, minor difference anyway. I didn't know that the GTS had "various" added electronics above the GT. I thought that they were more or less stripped/deprived of that nanny stuff vis-à-vis the GT2 and new GT1?
So, you've convinced me that you objectively know what you're measuring between the two Stingers you've driven. How much difference? Just the 0-60 difference? Both RWD, but with several hundred pounds of weight difference; so, wouldn't that account for most or all of it?