how can two identical cars be so different?

[HULK_I6T]

I know a bloke that bought two G6 fg falcons, one has 71,000km and the other has 77,000km. So pretty similar, both non turbo 6s and builds within a year of each other. He bought them both recently within 2 months of each other.

He said to me that they both drive completely different.. feel different..

He let me drive them back to back. Here were my observations..

Both cars in good condition and look as new. No known accidents or repairs.

- steering felt different, one felt smoother and easier where the other felt like there was more feedback from road but not as smooth. Nothing wrong with either but just different
- throttle response, one was more eager to kickdown, the other seemed to hang onto gears a bit more.. like it needed more of a jab of the throttle to get away
- engine response. One felt more torquey down low where the other felt like it went better above 4000rpm? Doing a flat throttle acceleration run.

Should two identical cars feel very similar or will mileage make them feel different over time (even though km are similar)

Or does ford tinker and make changes on the run as they build these cars? They both feel very different for whatever reason.

Or will even identical cars feel different to drive?