The Sea Ray 55 Sundancer 2009 vs Sea Ray Sundancer 310 2011 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.

Size is the most obvious dividing line here. The Sea Ray Sundancer 310 2011 measures 31,0 feet overall (2011), giving it roughly 25,0 additional feet of deck space compared to the Sea Ray 55 Sundancer 2009 at 6,0 feet (2009). Weight tells a clearer story for trailering families: the Sea Ray Sundancer 310 2011 tips the scales at 11 630 lbs — 11 095 lbs less than the Sea Ray 55 Sundancer 2009 at 535 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 1 051 hp, the Sea Ray 55 Sundancer 2009 has a 791-hp advantage over the Sea Ray Sundancer 310 2011's 260-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sea Ray 55 Sundancer 2009 carries 825 gallons versus 125 gallons in the Sea Ray Sundancer 310 2011. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.