When two boats share the same hull type — in this case both the Arima Sea Chaser 16 Fish On 2009 and the Arima Sea Pacer 21 2012 are modified vee designs with fiberglass 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 Arima Sea Pacer 21 2012 measures 21,2 feet overall (2012), giving it roughly 5,3 additional feet of deck space compared to the Arima Sea Chaser 16 Fish On 2009 at 15,9 feet (2009). Weight tells a clearer story for trailering families: the Arima Sea Pacer 21 2012 tips the scales at 215 lbs — 110 lbs less than the Arima Sea Chaser 16 Fish On 2009 at 105 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 Arima Sea Chaser 16 Fish On 2009 carries a rated maximum of 100 hp. Engine data for the Arima Sea Pacer 21 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 Arima Sea Pacer 21 2012 is rated for 6 passengers, while the Arima Sea Chaser 16 Fish On 2009 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Arima Sea Pacer 21 2012 could be the deciding factor.
Bottom line: Choose the Arima Sea Pacer 21 2012 if your priority is putting more people on the water — it handles 6 passengers and at 21,2 ft it has the deck room to back that rating up comfortably. The Arima Sea Chaser 16 Fish On 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.