When two boats share the same hull type — in this case both the SeaArk 1872 Pro (SC) 2009 and the SeaArk RX 160 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 1872 Pro (SC) 2009 at 18,0 ft versus SeaArk RX 160 2013 at 16,0 ft. Weight tells a clearer story for trailering families: the SeaArk 1872 Pro (SC) 2009 tips the scales at 875 lbs — 450 lbs more than the SeaArk RX 160 2013 at 425 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 130 hp, the SeaArk 1872 Pro (SC) 2009 has a 70-hp advantage over the SeaArk RX 160 2013's 60-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 SeaArk 1872 Pro (SC) 2009 is rated for 10 passengers, while the SeaArk RX 160 2013 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the SeaArk 1872 Pro (SC) 2009 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The SeaArk 1872 Pro (SC) 2009 comes in at 7 lbs per hp versus 7 lbs per hp for the SeaArk RX 160 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.