The Marathon DN 1236 Jon 2010 is a flat-bottom design and the Marathon Oneida 16 2009 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 Marathon Oneida 16 2009 measures 16,0 feet overall (2009), giving it roughly 4,0 additional feet of deck space compared to the Marathon DN 1236 Jon 2010 at 12,0 feet (2010). Weight tells a clearer story for trailering families: the Marathon Oneida 16 2009 tips the scales at 510 lbs - 400 lbs less than the Marathon DN 1236 Jon 2010 at 110 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 50 hp, the Marathon Oneida 16 2009 has a 43-hp advantage over the Marathon DN 1236 Jon 2010's 7-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Marathon Oneida 16 2009 is rated for 5 passengers, while the Marathon DN 1236 Jon 2010 caps at 3. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Marathon Oneida 16 2009 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Marathon Oneida 16 2009 comes in at 10 lbs per hp versus 16 lbs per hp for the Marathon DN 1236 Jon 2010. The lower the ratio the more explosive the acceleration - meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.
Bottom line: Choose the Marathon Oneida 16 2009 if your priority is putting more people on the water - it handles 5 passengers and at 16,0 ft it has the deck room to back that rating up comfortably. The Marathon DN 1236 Jon 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 3 that costs less to run day-to-day.