When two boats share the same hull type — in this case both the Sea Ray 205 Sport 2011 and the Sea Ray 240 Sundeck 2009 are modified vee designs with fiberglass 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?

Size is the most obvious dividing line here. The Sea Ray 240 Sundeck 2009 measures 26,3 feet overall (2009), giving it roughly 5,3 additional feet of deck space compared to the Sea Ray 205 Sport 2011 at 21,0 feet (2011). Weight tells a clearer story for trailering families: the Sea Ray 240 Sundeck 2009 tips the scales at 468 lbs — 153 lbs less than the Sea Ray 205 Sport 2011 at 315 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 320 hp, the Sea Ray 240 Sundeck 2009 has a 60-hp advantage over the Sea Ray 205 Sport 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 240 Sundeck 2009 carries 65 gallons versus 37 gallons in the Sea Ray 205 Sport 2011. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Sea Ray 240 Sundeck 2009 is rated for 12 passengers, while the Sea Ray 205 Sport 2011 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea Ray 240 Sundeck 2009 could be the deciding factor.