When two boats share the same hull type — in this case both the Sundance K16FLX 2013 and the Sundance NX17 2013 are modified vee designs with fiberglass construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department — Sundance K16FLX 2013 at 15,8 ft versus Sundance NX17 2013 at 17,2 ft. At 68 lbs and 135 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.

The power gap is worth calling out. Rated to 90 hp, the Sundance NX17 2013 has a 40-hp advantage over the Sundance K16FLX 2013's 50-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sundance NX17 2013 carries 29 gallons versus 1 gallons in the Sundance K16FLX 2013. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Sundance NX17 2013 is rated for 5 passengers, while the Sundance K16FLX 2013 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sundance NX17 2013 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Sundance K16FLX 2013 comes in at 1 lbs per hp versus 2 lbs per hp for the Sundance NX17 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.