Thank you Kongetro and Josefine for the information.
I most definitively would not know which crown was which unless some one told me, so I appreciate your help in this.
I find it very interesting that there are a number of Ducal crowns. I confess, I have never understood why particular crowns are used in specific instances, although I do appreciate the logic in using the same crown as was used for Princess Madeleine's christening for the christening of her children.