All this power debate is somewhat useless as the R35 is a complete performance package. If a 300KW R32 - R34 GTR was at a set of lights with a 300KW R35, even though they may have the same KW at the wheels, the R35 is going to obliterate all of them. There is more to this car than KW figures. The DSG gearbox was a gift from god, changing gears with with your foot flat to the floor, not shifting a gearstick or taking your foot off the accelerator is a pretty sureal experience for the first time and is another reason why this car accelerates so quickly.
I have a bit of real world experience on the street vs many other makes of cars and of course skylines (Don't take what I am saying as boasting just as a FIRST HAND description of the capabilities of any R35 from an actual owner) so far the only cars that have managed to beat the R35 are a 420KW at the wheels R33 and a stroked 7.4litre twin turbo VY Monaro. All from a rolling start, given a standing start (which neither owner wanted to do) it would be no contest. With a few mods on the 35 and it would be beating these previous mentioned vehicles from a rolling start as well.
My point here is that it is not all about HP and KW. The R35 is a screamer for many other reasons.