My money is on the Mach, he should woop the Z's ass all day and all night long. And nice numbers Fobra, i bet that dyno tune really helped open her up as well.
-04 Mustang GT-Intercooled Kenne bell 2.1L supercharged @10psi, bolt ons, 3:73 gears, big brake upgrade, some suspension, 315's rear.
-08 Corvette Z06-B&B exhaust, K&N filter.
-12 Tacoma Prerunner