When two boats share the same hull type — in this case both the Duckworth 18 2010 and the Duckworth Navigator Sport 175 2007 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?

The Duckworth 18 2010 carries a rated maximum of 115 hp. Engine data for the Duckworth Navigator Sport 175 2007 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Both carry nearly identical fuel loads — 42 gal and 42 gal — so range won't be a tiebreaker here.

Both boats are rated for 5 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.