The Marathon DN 1236 Jon 2011 is a flat-bottom design and the Marathon Seneca 12 2012 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.

On paper these two are close siblings in the size department - Marathon DN 1236 Jon 2011 at 12,0 ft versus Marathon Seneca 12 2012 at 11,7 ft. At 110 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 - 7 hp for the Marathon DN 1236 Jon 2011 and 10 hp for the Marathon Seneca 12 2012. 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 Seneca 12 2012 comes in at 12 lbs per hp versus 16 lbs per hp for the Marathon DN 1236 Jon 2011. 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.