I never drove the Z06 close to its limits so I think the Z07 pushes the gap between what I ask of the car and what it is capable of (on the street) to be a little greater.    In the softer shock settings the Z06 did seem to have a nicer ride.   The Z07's ride  is not objectionable but it's hard to hide a 62% stiffer front spring.  I have not ridden in a base C7 but they must be  very sweet daily drivers based on these Zs.  We're looking into trying Z06 springs in my Wife's Z07 to improve its ride a bit.