Xr6= S S/c, Xr6t=ss Xr8= ???
Well, in the land of the Eastern Islands, where mags from the west Islands of NZ (aka Aust.) arrive on about the 10th of the month they are for (eg Nov wheels and Motor arrived about 10 Nov.), all the comparison reports are alligned with a little distortion toward Holden.
For example, the XR6 NA vs S Supercharged, XR6T vs SS.
What will happen when the XR8 comes out? The mags (if they are truely unbiased) will have to retest SS vs XR8, as they did when Gen III broke the news (they didn't, in my knowledge EVER test SS vs TS/TE when the XR was 200kw, instead doing XR8 200kw vs SS 225kw). If they have any guts at all, they'll compare XR8 vs SS with the 25kw (235 vs 260 kw) on the other hoof.
And if they compare XR8 vs Club Sport, what'll the GT and GT P go against? Oh dear, Holden have, for the moment run out of cars....
AUIII XR8, Manual. Herrod Motorsport bits