Re: Island Packet and Cape Dory 33- 40 range.
Full keel so slower than a Bene/Bav/Jun esp in light winds.
Keel is slightly less efficient to windward than a fin despite the marketing hype.
But when you go aground the keel protects the rudder.
Benefits from a bow thruster if berthing in a tight marina.
Comfortable rocking chair of a boat. I like the 485 interior. But my 44 ft old girl eats it for breakfast esp in light winds or to windward.