The Marathon Cayuga 16 2010 is a modified-V design and the Marathon Otisco 1236 2008 is a flat-bottom 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 Cayuga 16 2010 measures 16,0 feet overall (2010), giving it roughly 4,0 additional feet of deck space compared to the Marathon Otisco 1236 2008 at 12,0 feet (2008). Weight tells a clearer story for trailering families: the Marathon Cayuga 16 2010 tips the scales at 420 lbs - 310 lbs more than the Marathon Otisco 1236 2008 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 Marathon Cayuga 16 2010 carries a rated maximum of 40 hp. Engine data for the Marathon Otisco 1236 2008 wasn't available in our records - check the manufacturer's spec sheet before sizing a motor.
For family outings this is probably the sharpest distinction between the two. The Marathon Cayuga 16 2010 is rated for 6 passengers, while the Marathon Otisco 1236 2008 caps at 3. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Marathon Cayuga 16 2010 could be the deciding factor.
Bottom line: Choose the Marathon Cayuga 16 2010 if your priority is putting more people on the water - it handles 6 passengers and at 16,0 ft it has the deck room to back that rating up comfortably. The Marathon Otisco 1236 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 3 that costs less to run day-to-day.