Both the Duckworth Pacific Magnum 21 ft. 2007 and the Duckworth Pacific Navigator Sport 18 2013 are deep-V designs, both built in aluminium, so the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

The Duckworth Pacific Navigator Sport 18 2013 tops out at 115 hp. Engine specs for the Duckworth Pacific Magnum 21 ft. 2007 aren't listed - confirm with a dealer before selecting an outboard.Fuel capacity breaks the other way: the Duckworth Pacific Magnum 21 ft. 2007 carries 62 gallons versus 42 gallons in the Duckworth Pacific Navigator Sport 18 2013. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 6 passengers - a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.