Agree: nice work. They are both in the same corner albeit the zl1 is further ahead and going faster speed. Given what remains is 6 more corners and a very long straight the zl1 would clearly beat the z/28. Personally i think it would be more than 2 seconds, but thats splitting hair
And obviously a zl1 on trofeo R tires would make this delta much wider. But thats not what this car comes with tire wise from a factory, so a moot point, except for a track rat.