Some people talk here about the change of look of Mathilde. I think it is comparable with the evolution of princes Diana. The first years when she was just a young lady, she just 20, Mathilde 26, they were dressed in a different way. More girly, or too old, in a way they had to search to put a line in their clothing. Being dressed as a princess is a bit different of normal people. Now Mathilde is a real woman, with 3 children, the girl is gone. And i think you can see that in her clothing and her behaviour.
And also the prince is more stylish when you compare it with the ever black/gray/dark brown suits he was wearing before he knew Mathilde (and Natan).