When two boats share the same hull type — in this case both the Sweetwater SW 240 2011 and the Sweetwater SW 2586 RE3 I/O 2008 are pontoon designs with aluminum 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 — Sweetwater SW 240 2011 at 26,0 ft versus Sweetwater SW 2586 RE3 I/O 2008 at 24,0 ft. Weight tells a clearer story for trailering families: the Sweetwater SW 240 2011 tips the scales at 2 418 lbs — 437 lbs more than the Sweetwater SW 2586 RE3 I/O 2008 at 1 981 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 — 150 hp for the Sweetwater SW 240 2011 and 135 hp for the Sweetwater SW 2586 RE3 I/O 2008. 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 Sweetwater SW 2586 RE3 I/O 2008 carries 37 gallons versus 24 gallons in the Sweetwater SW 240 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 Sweetwater SW 240 2011 is rated for 13 passengers, while the Sweetwater SW 2586 RE3 I/O 2008 caps at 12. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sweetwater SW 240 2011 could be the deciding factor.
Bottom line: Choose the Sweetwater SW 240 2011 if your priority is putting more people on the water — it handles 13 passengers and at 26,0 ft it has the deck room to back that rating up comfortably. The Sweetwater SW 2586 RE3 I/O 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 12 that costs less to run day-to-day.