When two boats share the same hull type — in this case both the SeaArk BayFisher 2010 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 BayFisher 2010 at 20,1 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 — 1 074 lbs less than the SeaArk BayFisher 2010 at 119 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.
Both boats share a closely matched power ceiling — 140 hp for the SeaArk BayFisher 2010 and 140 hp for the SeaArk RiverCat 180 SC 2013. 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 BayFisher 2010 is rated for 12 passengers, while the SeaArk RiverCat 180 SC 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 BayFisher 2010 could be the deciding factor.
Bottom line: Choose the SeaArk BayFisher 2010 if your priority is putting more people on the water — it handles 12 passengers and at 20,1 ft it has the deck room to back that rating up comfortably. The SeaArk RiverCat 180 SC 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.