Again.. Have you raced yourself against the clock with all the cars? That would be a true test.
Try it on a few tracks. How about Downtown Underground, then try Cutting Coroners. Do a couple laps and compare.
Those 2 tracks are probably more about the driver and less the car. Criminal records, 1 lap will tell you which one accelerates fastest, 2 laps will tell you which corners better ( with accel data) and the commute will tell you top speed.
I dont have a dominator, But I have a Gauntlet, Sabre Turbo and a Phoenix I can test. results soon.... I'll use my newly acquired Youga as a control.