Matching a modified vee Duckworth 721 2011 against a deep vee Duckworth Navigator Sport 20 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 2011 at 21,0 ft versus Duckworth Navigator Sport 20 2013 at 20,3 ft. At 16 lbs and 16 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
The Duckworth Navigator Sport 20 2013 tops out at 15 hp. Engine specs for the Duckworth 721 2011 aren't listed — confirm with a dealer before selecting an outboard.Both carry nearly identical fuel loads — 42 gal and 42 gal — so range won't be a tiebreaker here.
Both boats are rated for 6 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: The Duckworth 721 2011 and Duckworth Navigator Sport 20 2013 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.