I had a 2006 G35 and traded it in for my 2009 370Z. I could tell the difference right away. The 370Z is awesome.

 

i believe the hrz and 370 both dyno about 280 to 270 horsepower, so i would
think they'd have similar straight line speed. I like the 370 but i don't love it. when i first saw the 350z in person, this weird feeling came over me lol, it was love at first sight. The 370 is growing on me though.