The Duckworth 721 2011 is a modified-V design and the Duckworth Offshore 26 2012 is a deep-V design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
Size is the most obvious dividing line here. The Duckworth Offshore 26 2012 measures 28,0 feet overall (2012), giving it roughly 7,0 additional feet of deck space compared to the Duckworth 721 2011 at 21,0 feet (2011). Weight tells a clearer story for trailering families: the Duckworth Offshore 26 2012 tips the scales at 4 700 lbs - 3 100 lbs less than the Duckworth 721 2011 at 1 600 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 Duckworth Offshore 26 2012 tops out at 500 hp. Engine specs for the Duckworth 721 2011 aren't listed - confirm with a dealer before selecting an outboard.Fuel capacity breaks the other way: the Duckworth Offshore 26 2012 carries 175 gallons versus 42 gallons in the Duckworth 721 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 Offshore 26 2012 is rated for 8 passengers, while the Duckworth 721 2011 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Duckworth Offshore 26 2012 could be the deciding factor.
Bottom line: Choose the Duckworth Offshore 26 2012 if your priority is putting more people on the water - it handles 8 passengers and at 28,0 ft it has the deck room to back that rating up comfortably. The Duckworth 721 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.