The Cobia Boats 217CC 2012 is a deep-V design and the Cobia Boats 237CC 2010 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 - Cobia Boats 217CC 2012 at 21,5 ft versus Cobia Boats 237CC 2010 at 23,6 ft. Weight tells a clearer story for trailering families: the Cobia Boats 237CC 2010 tips the scales at 3 600 lbs - 650 lbs less than the Cobia Boats 217CC 2012 at 2 950 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 Cobia Boats 237CC 2010 has a 50-hp advantage over the Cobia Boats 217CC 2012's 200-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Cobia Boats 237CC 2010 carries 129 gallons versus 90 gallons in the Cobia Boats 217CC 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 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 Cobia Boats 237CC 2010 at 23,6 ft is the right call if deck space, comfort, and entertaining are top of your list. The Cobia Boats 217CC 2012 at 21,5 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.