When two boats share the same hull type — in this case both the Duckworth 18 2010 and the Duckworth Navigator Sport 195 2009 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 Navigator Sport 195 2009 at 19,5 ft. Weight tells a clearer story for trailering families: the Duckworth 18 2010 tips the scales at 2 375 lbs — 2 220 lbs more than the Duckworth Navigator Sport 195 2009 at 155 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 150 hp, the Duckworth Navigator Sport 195 2009 has a 35-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. 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 Navigator Sport 195 2009 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 Navigator Sport 195 2009 could be the deciding factor.
Bottom line: Choose the Duckworth Navigator Sport 195 2009 if your priority is putting more people on the water — it handles 6 passengers and at 19,5 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.