The Marathon DN 12 Utility V 2011 is a deep-V design and the Marathon Otisco 1036 2009 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.
On paper these two are close siblings in the size department - Marathon DN 12 Utility V 2011 at 11,7 ft versus Marathon Otisco 1036 2009 at 10,0 ft. At 121 lbs and 96 lbs respectively, both sit in a similar weight class - either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
Both boats share a closely matched power ceiling - 10 hp for the Marathon DN 12 Utility V 2011 and 3 hp for the Marathon Otisco 1036 2009. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup.
For family outings this is probably the sharpest distinction between the two. The Marathon DN 12 Utility V 2011 is rated for 3 passengers, while the Marathon Otisco 1036 2009 caps at 2. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Marathon DN 12 Utility V 2011 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Marathon DN 12 Utility V 2011 comes in at 12 lbs per hp versus 32 lbs per hp for the Marathon Otisco 1036 2009. 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 DN 12 Utility V 2011 if your priority is putting more people on the water - it handles 3 passengers and at 11,7 ft it has the deck room to back that rating up comfortably. The Marathon Otisco 1036 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 2 that costs less to run day-to-day.