The Concept 4400 Sport Yacht 2009 is a modified-V design and the Concept 4400 Sport Yacht 2012 is a deep-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 - Concept 4400 Sport Yacht 2009 at 44,0 ft versus Concept 4400 Sport Yacht 2012 at 44,3 ft. Weight tells a clearer story for trailering families: the Concept 4400 Sport Yacht 2012 tips the scales at 13 550 lbs - 200 lbs less than the Concept 4400 Sport Yacht 2009 at 13 350 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 - 1 400 hp for the Concept 4400 Sport Yacht 2009 and 1 400 hp for the Concept 4400 Sport Yacht 2012. 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. Both carry nearly identical fuel loads - 400 gal and 400 gal - so range won't be a tiebreaker here.
Both boats are rated for 13 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 Concept 4400 Sport Yacht 2009 and Concept 4400 Sport Yacht 2012 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.