It should be GTR vs Gt(s)T, picking one out of each category. Id go a GTR over a single turbo anyday, especially in the R34. better seats, hotter factory kit, wider guards, better spoiler, better rims.....
The wider guards give the GTR's a much better stance, you'd be silly to choose a GT(S)T over the looks of the GTR in the same model.
thats my 200 Y.