The Sea Ray SLX 310 2022 vs Sea Ray Sundeck 240 2016 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 SLX 310 2022 measures 31,6 feet overall (2022), giving it roughly 7,0 additional feet of deck space compared to the Sea Ray Sundeck 240 2016 at 24,6 feet (2016). Weight tells a clearer story for trailering families: the Sea Ray SLX 310 2022 tips the scales at 10 787 lbs - 6 047 lbs more than the Sea Ray Sundeck 240 2016 at 4 740 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 - 250 hp for the Sea Ray SLX 310 2022 and 250 hp for the Sea Ray Sundeck 240 2016. 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 SLX 310 2022 carries 130 gallons versus 55 gallons in the Sea Ray Sundeck 240 2016. 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 SLX 310 2022 is rated for 9 passengers, while the Sea Ray Sundeck 240 2016 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 SLX 310 2022 could be the deciding factor.
Bottom line: Choose the Sea Ray SLX 310 2022 if your priority is putting more people on the water - it handles 9 passengers and at 31,6 ft it has the deck room to back that rating up comfortably. The Sea Ray Sundeck 240 2016 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 7 that costs less to run day-to-day.