When two boats share the same hull type — in this case both the SeaArk 1860 V-Pro LD (CC) 2012 and the SeaArk RiverCat 180 SC 2013 are modified vee designs with aluminum 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 — SeaArk 1860 V-Pro LD (CC) 2012 at 18,0 ft versus SeaArk RiverCat 180 SC 2013 at 18,0 ft. Weight tells a clearer story for trailering families: the SeaArk RiverCat 180 SC 2013 tips the scales at 1 193 lbs — 1 118 lbs less than the SeaArk 1860 V-Pro LD (CC) 2012 at 75 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 140 hp, the SeaArk RiverCat 180 SC 2013 has a 50-hp advantage over the SeaArk 1860 V-Pro LD (CC) 2012's 90-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

Both boats are rated for 5 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 SeaArk 1860 V-Pro LD (CC) 2012 comes in at 1 lbs per hp versus 9 lbs per hp for the SeaArk RiverCat 180 SC 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.