In defense of Marianne I have to admit my initial thought was the same, it felt "wrong" to see this fantastic broche on Queen Máxima. But that was only because Princess Beatrix still feels as The Queen.
Of course Willem-Alexander is now The King and his beautiful spouse has every right to choose jewels from the fabulous collection. Overall Princess Beatrix was still better bejewelled, not only in quantity but also in historical provenance, after all her stunning diamond broche has a more royal and even imperial provenance (Romanov/Württemberg) than Máxima's large bow brooch which came from Princess Amalia of the Netherlands born Princess von Sachsen-Weimar und Eisenach (1830-1872).