The Marathon Grumman Classic 1680LC 2013 is a pontoon design and the Marathon Seneca 16 2011 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 Grumman Classic 1680LC 2013 at 16,0 ft versus Marathon Seneca 16 2011 at 16,0 ft. Weight tells a clearer story for trailering families: the Marathon Grumman Classic 1680LC 2013 tips the scales at 1 460 lbs - 1 159 lbs more than the Marathon Seneca 16 2011 at 301 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.

Both boats share a closely matched power ceiling - 40 hp for the Marathon Grumman Classic 1680LC 2013 and 40 hp for the Marathon Seneca 16 2011. 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 Seneca 16 2011 is rated for 7 passengers, while the Marathon Grumman Classic 1680LC 2013 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Marathon Seneca 16 2011 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Marathon Seneca 16 2011 comes in at 8 lbs per hp versus 37 lbs per hp for the Marathon Grumman Classic 1680LC 2013. 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.