Interesting actually .. of course i wouldn't know where you are talking about.. but if say i did ... whilst of course the GTR go nicely, its not like the modified GTS-T can't keep up or are left behind. In the end it all comes down to driver skill, and of course having a car you know how it behaves helps.
And this suspension stuff is nonsense, as who really keeps the stock suspension in either a GTR or GTS-T. To me there is no inherant differences in the actual geometry after all (?? correct me if wrong). It can be a VSPEC GTR or whatever it likes, and they come with strut bars and nicer factory suspension.. but upgrading these things on a lowly GTS-T to aftermarket (probably much better than GTR stock) and they start behaving a lot more nicely and being almost as "point and shoot" as a GTR (i'd imagine). The GTR does only pass drive to the front on loss of traction after all...
Make the GTS-T lose as little traction as possible, bump up the torque a little (what people are talking about with the GTR "pushing them back in their seat" is mainly torque I'd imagine.. helped by the twin turbos), eliminate lag as much as possible in the GTS-T coming from just the single turbo and the differences become thinner and thinner.