I have both. A 2002 S2K and a 2004 350 Z. The 350 I drive to work. The S2K is at the house ( 4000 miles) waiting on some upcoming changes that will give the 350 some serious problems. The 350 is a little quicker now due to the fact that it has a little more HP (287 @ 6200 rpm) and higher torque (274 @ 4800 rpm). Top end is about the same. However when it comes to handling on the road and just plain out fun to drive, it's hard to beat the S2K.