Less sweet and indeed lighter. Ethereal but still on your skin after several hours. I would say half a day for sure. Some Iris can smell rather carroty, and that's what disturbed me with the original .And so I didn't buy it. The pH Cologne, by the way, was there from the start. But it was decided to launch the EDT instead.
Fortunately, Dior didn't wait too long before they also issued the cologne. To me it's the real thing and more special among all Diors, clear as the summer morning air. I am very happy with it.