When two boats share the same hull type — in this case both the Duckworth 18 2010 and the Duckworth 18 Sport 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?
On paper these two are close siblings in the size department — Duckworth 18 2010 at 18,0 ft versus Duckworth 18 Sport 2011 at 20,3 ft. Weight tells a clearer story for trailering families: the Duckworth 18 2010 tips the scales at 2 375 lbs — 920 lbs more than the Duckworth 18 Sport 2011 at 1 455 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.
Both boats share a closely matched power ceiling — 115 hp for the Duckworth 18 2010 and 115 hp for the Duckworth 18 Sport 2011. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Both carry nearly identical fuel loads — 42 gal and 42 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Duckworth 18 Sport 2011 is rated for 6 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 18 Sport 2011 could be the deciding factor.
Bottom line: Choose the Duckworth 18 Sport 2011 if your priority is putting more people on the water — it handles 6 passengers and at 20,3 ft it has the deck room to back that rating up comfortably. The Duckworth 18 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.