Explain these numbers: Carrera S vs 370Z

spearfish25

So according to Road and Track, theses are the performance stats for the Carrera S, Cayman S, and 370Z. I have trouble figuring out why the Z is so much slower than the other two, particularly the Carrera S. Aside from the benefit of a rear weight bias for the Carrera giving a quicker 0-60 (better rear traction), the 1/4mi times baffle me. Is the 70lbs and 20hp/25tq that significant? All theories welcome...!

Carrera S
355hp
295tq
wt 3295lbs
0-60 4.1s
0-100 10.3s
60-0 111ft
1/4 12.6@111.9

Cayman S
320hp
273tq
wt 3100lbs
0-60 4.6s
0-100 10.6s
60-0 117ft
1/4 12.9@108.8

370Z
332hp
270tq
wt 3360lbs
0-60 5.2s
0-100 12.8s
60-0 115ft
1/4 13.7@103.9

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2013 Cadillac V-Wagon, RIP Z