The Stamas 289 Tarpon Inboard 2012 is a deep-V design and the Stamas 310 Tarpon Outboard 2006 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.
Size is the most obvious dividing line here. The Stamas 310 Tarpon Outboard 2006 measures 32,0 feet overall (2006), giving it roughly 3,3 additional feet of deck space compared to the Stamas 289 Tarpon Inboard 2012 at 28,8 feet (2012). Weight tells a clearer story for trailering families: the Stamas 310 Tarpon Outboard 2006 tips the scales at 9 250 lbs - 2 560 lbs less than the Stamas 289 Tarpon Inboard 2012 at 6 690 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 500 hp, the Stamas 310 Tarpon Outboard 2006 has a 260-hp advantage over the Stamas 289 Tarpon Inboard 2012's 240-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Stamas 310 Tarpon Outboard 2006 carries 400 gallons versus 106 gallons in the Stamas 289 Tarpon Inboard 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 9 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 Stamas 310 Tarpon Outboard 2006 at 32,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Stamas 289 Tarpon Inboard 2012 at 28,8 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.