When two boats share the same hull type — in this case both the Sea Ray 240 Sundeck 2008 and the Sea Ray 270 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?

On paper these two are close siblings in the size department — Sea Ray 240 Sundeck 2008 at 26,0 ft versus Sea Ray 270 Select EX 2010 at 28,5 ft. Weight tells a clearer story for trailering families: the Sea Ray 270 Select EX 2010 tips the scales at 5 555 lbs — 5 087 lbs less than the Sea Ray 240 Sundeck 2008 at 468 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 425 hp, the Sea Ray 270 Select EX 2010 has a 105-hp advantage over the Sea Ray 240 Sundeck 2008's 320-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 270 Select EX 2010 carries 91 gallons versus 65 gallons in the Sea Ray 240 Sundeck 2008. 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 2008 is rated for 12 passengers, while the Sea Ray 270 Select EX 2010 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 2008 could be the deciding factor.