Matching a modified vee SeaArk RXV 186 2013 against a tunnel SeaArk Tunnel Jon 1872MVT 2008 means you're likely deciding between two genuinely different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
On paper these two are close siblings in the size department — SeaArk RXV 186 2013 at 18,5 ft versus SeaArk Tunnel Jon 1872MVT 2008 at 18,0 ft. At 9 lbs and 75 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.
Both boats share a closely matched power ceiling — 90 hp for the SeaArk RXV 186 2013 and 80 hp for the SeaArk Tunnel Jon 1872MVT 2008. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup.
For family outings this is probably the sharpest distinction between the two. The SeaArk Tunnel Jon 1872MVT 2008 is rated for 12 passengers, while the SeaArk RXV 186 2013 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the SeaArk Tunnel Jon 1872MVT 2008 could be the deciding factor.
Bottom line: Choose the SeaArk Tunnel Jon 1872MVT 2008 if your priority is putting more people on the water — it handles 12 passengers and at 18,0 ft it has the deck room to back that rating up comfortably. The SeaArk RXV 186 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.