The Sea Ray 240 Sundancer 2010 vs Sea Ray SDX 290 2023 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 SDX 290 2023 measures 29,2 feet overall (2023), giving it roughly 4,4 additional feet of deck space compared to the Sea Ray 240 Sundancer 2010 at 24,8 feet (2010). Weight tells a clearer story for trailering families: the Sea Ray SDX 290 2023 tips the scales at 6 595 lbs — 1 002 lbs less than the Sea Ray 240 Sundancer 2010 at 5 593 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.

Both boats share a closely matched power ceiling — 300 hp for the Sea Ray 240 Sundancer 2010 and 300 hp for the Sea Ray SDX 290 2023. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Fuel capacity breaks the other way: the Sea Ray SDX 290 2023 carries 85 gallons versus 75 gallons in the Sea Ray 240 Sundancer 2010. 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 SDX 290 2023 is rated for 8 passengers, while the Sea Ray 240 Sundancer 2010 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea Ray SDX 290 2023 could be the deciding factor.