Both the Duckworth 30 2011 and the Duckworth Ultra Magnum Inboard Jet 24 2012 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?
Size is the most obvious dividing line here. The Duckworth 30 2011 measures 30,0 feet overall (2011), giving it roughly 6,0 additional feet of deck space compared to the Duckworth Ultra Magnum Inboard Jet 24 2012 at 24,0 feet (2012). Weight tells a clearer story for trailering families: the Duckworth 30 2011 tips the scales at 5 400 lbs - 1 680 lbs more than the Duckworth Ultra Magnum Inboard Jet 24 2012 at 3 720 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 30 2011 carries a rated maximum of 500 hp. Engine data for the Duckworth Ultra Magnum Inboard Jet 24 2012 wasn't available in our records - check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Duckworth 30 2011 carries 130 gallons versus 80 gallons in the Duckworth Ultra Magnum Inboard Jet 24 2012. 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 Ultra Magnum Inboard Jet 24 2012 caps at 7. 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.
Bottom line: Choose the Duckworth 30 2011 if your priority is putting more people on the water - it handles 9 passengers and at 30,0 ft it has the deck room to back that rating up comfortably. The Duckworth Ultra Magnum Inboard Jet 24 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 7 that costs less to run day-to-day.