The Klamath 10 ft. Jac 2008 is a flat-bottom design and the Klamath 15 Advantage S 2013 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.
Size is the most obvious dividing line here. The Klamath 15 Advantage S 2013 measures 15,2 feet overall (2013), giving it roughly 5,2 additional feet of deck space compared to the Klamath 10 ft. Jac 2008 at 10,0 feet (2008). Weight tells a clearer story for trailering families: the Klamath 15 Advantage S 2013 tips the scales at 350 lbs - 220 lbs less than the Klamath 10 ft. Jac 2008 at 130 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 power gap is worth calling out. Rated to 45 hp, the Klamath 15 Advantage S 2013 has a 40-hp advantage over the Klamath 10 ft. Jac 2008's 5-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Klamath 15 Advantage S 2013 is rated for 6 passengers, while the Klamath 10 ft. Jac 2008 caps at 3. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Klamath 15 Advantage S 2013 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Klamath 15 Advantage S 2013 comes in at 8 lbs per hp versus 26 lbs per hp for the Klamath 10 ft. Jac 2008. 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 Klamath 15 Advantage S 2013 if your priority is putting more people on the water - it handles 6 passengers and at 15,2 ft it has the deck room to back that rating up comfortably. The Klamath 10 ft. Jac 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.