Mustangs are horrible for overall driving ergonomics/position. If you're on the tall side it's very hard to reach the shifter with the seat back.

The GTO is by far the nicer car, I love the interiors.

The CAGS (computer aided gear selector) or skip-shift was instituted so the car wouldn't get slammed with the gas guzzler tax. If you add more throttle or get the rpms higher it won't come into effect.

You can buy a buypass that will allow you to unplug it w/o setting a check engine light.