The Marathon Otisco 1436 2008 is a flat-bottom design and the Marathon Utility V - DN 12 2009 is a deep-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 - Marathon Otisco 1436 2008 at 14,0 ft versus Marathon Utility V - DN 12 2009 at 11,0 ft. At 130 lbs and 121 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 - 15 hp for the Marathon Otisco 1436 2008 and 10 hp for the Marathon Utility V - DN 12 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.
Both boats are rated for 3 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.
At this size, power-to-weight ratio matters more than outright horsepower. The Marathon Otisco 1436 2008 comes in at 9 lbs per hp versus 12 lbs per hp for the Marathon Utility V - DN 12 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: The Marathon Otisco 1436 2008 at 14,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Marathon Utility V - DN 12 2009 at 11,0 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.