When two boats share the same hull type — in this case both the Sea Ray 240 Sundancer 2009 and the Sea Ray 300 Select EX 2010 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 300 Select EX 2010 measures 29,5 feet overall (2010), giving it roughly 4,7 additional feet of deck space compared to the Sea Ray 240 Sundancer 2009 at 24,8 feet (2009). Weight tells a clearer story for trailering families: the Sea Ray 240 Sundancer 2009 tips the scales at 5 593 lbs — 5 516 lbs more than the Sea Ray 300 Select EX 2010 at 77 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 2009 and 300 hp for the Sea Ray 300 Select EX 2010. 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 240 Sundancer 2009 carries 75 gallons versus 13 gallons in the Sea Ray 300 Select EX 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 300 Select EX 2010 is rated for 8 passengers, while the Sea Ray 240 Sundancer 2009 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 300 Select EX 2010 could be the deciding factor.