When two boats share the same hull type — in this case both the SeaArk RX 160 2013 and the SeaArk RXV 186 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 RX 160 2013 at 16,0 ft versus SeaArk RXV 186 2013 at 18,5 ft. Weight tells a clearer story for trailering families: the SeaArk RX 160 2013 tips the scales at 425 lbs — 416 lbs more than the SeaArk RXV 186 2013 at 9 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 90 hp, the SeaArk RXV 186 2013 has a 30-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 RXV 186 2013 is rated for 5 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 RXV 186 2013 could be the deciding factor.
Bottom line: Choose the SeaArk RXV 186 2013 if your priority is putting more people on the water — it handles 5 passengers and at 18,5 ft it has the deck room to back that rating up comfortably. The SeaArk RX 160 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.