Matching a modified vee Duckworth 721 2010 against a deep vee Duckworth Ultra Magnum Inboard Jet 23 2013 means you're likely deciding between two genuinely different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
On paper these two are close siblings in the size department — Duckworth 721 2010 at 21,0 ft versus Duckworth Ultra Magnum Inboard Jet 23 2013 at 23,0 ft. Weight tells a clearer story for trailering families: the Duckworth Ultra Magnum Inboard Jet 23 2013 tips the scales at 361 lbs — 345 lbs less than the Duckworth 721 2010 at 16 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 721 2010 carries a rated maximum of 200 hp. Engine data for the Duckworth Ultra Magnum Inboard Jet 23 2013 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Duckworth 721 2010 carries 42 gallons versus 8 gallons in the Duckworth Ultra Magnum Inboard Jet 23 2013. 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 Ultra Magnum Inboard Jet 23 2013 is rated for 7 passengers, while the Duckworth 721 2010 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Duckworth Ultra Magnum Inboard Jet 23 2013 could be the deciding factor.
Bottom line: Choose the Duckworth Ultra Magnum Inboard Jet 23 2013 if your priority is putting more people on the water — it handles 7 passengers and at 23,0 ft it has the deck room to back that rating up comfortably. The Duckworth 721 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.