Thats why I did it, maybe driving two different cars back to back makes it obvious, but driving my car, then driving something else for a week or so, then driving my car with the Cup rack did not really highlight any differences.
The technicians did confirm that it was definitely a shorter rack too, but it felt very similar to me. Perhaps the effects were dulled as it was fitted at the same time as a [huge mistake] X85 Cup front anti-roll bar.