The Nordic Boats 28 Heat 2010 is a modified-V design and the Nordic Boats 28SS Coupe 2011 is a catamaran 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 - Nordic Boats 28 Heat 2010 at 28,3 ft versus Nordic Boats 28SS Coupe 2011 at 28,6 ft. Weight tells a clearer story for trailering families: the Nordic Boats 28 Heat 2010 tips the scales at 4 600 lbs - 200 lbs more than the Nordic Boats 28SS Coupe 2011 at 4 400 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 are rated for 8 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 Nordic Boats 28 Heat 2010 and Nordic Boats 28SS Coupe 2011 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.