The SouthWind 201 L 2011 is a tri-hull design and the SouthWind 212 SD 2012 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 201 L 2011 at 20,1 ft versus SouthWind 212 SD 2012 at 20,5 ft. Weight tells a clearer story for trailering families: the SouthWind 212 SD 2012 tips the scales at 3 700 lbs - 500 lbs less than the SouthWind 201 L 2011 at 3 200 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 200 hp, the SouthWind 201 L 2011 has a 85-hp advantage over the SouthWind 212 SD 2012's 115-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 50 gal and 50 gal - so range won't be a tiebreaker here.
Both boats are rated for 10 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: Performance buyers should lean toward the SouthWind 201 L 2011 and its 200-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the SouthWind 212 SD 2012 with its 115-hp rating is the more economical daily driver.