When two boats share the same hull type — in this case both the SeaArk CRX 186 2012 and the SeaArk RX 180 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 CRX 186 2012 at 18,5 ft versus SeaArk RX 180 2013 at 18,0 ft. At 11 lbs and 51 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 140 hp, the SeaArk CRX 186 2012 has a 50-hp advantage over the SeaArk RX 180 2013'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.
Bottom line: Performance buyers should lean toward the SeaArk CRX 186 2012 and its 140-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the SeaArk RX 180 2013 with its 90-hp rating is the more economical daily driver.