Re: Full or fin keel?
Assuming good build quality and equipment I agree that "Both are as safe and capable as the crew on board."
In light airs the fin should be able to sail well with light sails - the heavy full keel boat not so much. The heavier the boat the larger the sails and the heavier the gear on deck as well, as the loads are higher.
There are a great many fin keel boats out there crossing oceans- probably a lot more than full keel boats - at this time. I am not advocating an extreme fin - but a moderate one.
My comment about comparing equal weight boats makes sense if you are building new mostly as boats price by the pound more or less. I would much sooner have a 40' fin keel boat than a 30' full keel boat that weighs the same.
Living aboard in Victoria Harbour