When two boats share the same hull type — in this case both the Sundance DX18 2012 and the Sundance SV205 2009 are modified vee designs with composite 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 — Sundance DX18 2012 at 17,8 ft versus Sundance SV205 2009 at 20,4 ft. Weight tells a clearer story for trailering families: the Sundance DX18 2012 tips the scales at 1 355 lbs — 1 170 lbs more than the Sundance SV205 2009 at 185 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 Sundance SV205 2009 has a 60-hp advantage over the Sundance DX18 2012's 90-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sundance SV205 2009 carries 45 gallons versus 33 gallons in the Sundance DX18 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
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 Sundance SV205 2009 at 20,4 ft is the right call if deck space, comfort, and entertaining are top of your list. The Sundance DX18 2012 at 17,8 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.