When two boats share the same hull type — in this case both the SeaArk 1648FN Flat Nose Jon 2013 and the SeaArk 2072 C.U.B. 2012 are flat 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?
Size is the most obvious dividing line here. The SeaArk 2072 C.U.B. 2012 measures 20,1 feet overall (2012), giving it roughly 4,1 additional feet of deck space compared to the SeaArk 1648FN Flat Nose Jon 2013 at 16,0 feet (2013). Weight tells a clearer story for trailering families: the SeaArk 1648FN Flat Nose Jon 2013 tips the scales at 355 lbs — 268 lbs more than the SeaArk 2072 C.U.B. 2012 at 87 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 SeaArk 1648FN Flat Nose Jon 2013 carries a rated maximum of 25 hp. Engine data for the SeaArk 2072 C.U.B. 2012 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.
For family outings this is probably the sharpest distinction between the two. The SeaArk 2072 C.U.B. 2012 is rated for 6 passengers, while the SeaArk 1648FN Flat Nose Jon 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 2072 C.U.B. 2012 could be the deciding factor.
Bottom line: Choose the SeaArk 2072 C.U.B. 2012 if your priority is putting more people on the water — it handles 6 passengers and at 20,1 ft it has the deck room to back that rating up comfortably. The SeaArk 1648FN Flat Nose Jon 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.