When two boats share the same hull type — in this case both the Duckworth 18 2010 and the Duckworth 30 2011 are deep vee designs with aluminum construction — 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?

Size is the most obvious dividing line here. The Duckworth 18 2010 measures 18,0 feet overall (2010), giving it roughly 15,0 additional feet of deck space compared to the Duckworth 30 2011 at 3,0 feet (2011). Weight tells a clearer story for trailering families: the Duckworth 18 2010 tips the scales at 2 375 lbs — 2 321 lbs more than the Duckworth 30 2011 at 54 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

The power gap is worth calling out. Rated to 500 hp, the Duckworth 30 2011 has a 385-hp advantage over the Duckworth 18 2010's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Duckworth 18 2010 carries 42 gallons versus 13 gallons in the Duckworth 30 2011. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Duckworth 30 2011 is rated for 9 passengers, while the Duckworth 18 2010 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Duckworth 30 2011 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Duckworth 30 2011 comes in at 0 lbs per hp versus 21 lbs per hp for the Duckworth 18 2010. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.