I insured S/V Viva with Panteanius 20 months ago after trying to work with French Insurance brokers/ French insurance companies to no avail. I always felt I was not insured. In addition there was so many limitations in the geographical scope for a round the world tour.
As far as I know by reading contracts and internet:
Insurance laws and markets are historically very different in France than in Germany [Pantaenius].
As a key example in France for Yatchs you are insured in "valeur d'usage" [used value hence "vetuste" will reduce the amount of your claim] while in Germany Pantaenius will insure you for "valeur a neuf" - new value or value to replace.
I requested upfront quotes for round the world and I ended up with 3 prices: Med, Atlantic including Caribbean and then Pacific.
So far so good with no claim to test my choice.
Opua, New Zealand