The SouthWind 229 FX 2012 is a tri-hull design and the SouthWind 2400 SD 2009 is a modified-V design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
On paper these two are close siblings in the size department - SouthWind 229 FX 2012 at 22,8 ft versus SouthWind 2400 SD 2009 at 25,5 ft. Weight tells a clearer story for trailering families: the SouthWind 229 FX 2012 tips the scales at 4 700 lbs - 978 lbs more than the SouthWind 2400 SD 2009 at 3 722 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 250 hp, the SouthWind 2400 SD 2009 has a 135-hp advantage over the SouthWind 229 FX 2012's 115-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the SouthWind 2400 SD 2009 carries 77 gallons versus 50 gallons in the SouthWind 229 FX 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 12 passengers - a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: The SouthWind 2400 SD 2009 at 25,5 ft is the right call if deck space, comfort, and entertaining are top of your list. The SouthWind 229 FX 2012 at 22,8 ft wins on trailering ease, likely lower purchase price, and simpler docking - a solid choice for a buyer who wants more boat for less money.