When two boats share the same hull type — in this case both the Arima Sea Chaser 19 2012 and the Arima SR Explorer 21 2010 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?
On paper these two are close siblings in the size department — Arima Sea Chaser 19 2012 at 18,9 ft versus Arima SR Explorer 21 2010 at 21,2 ft. At 16 lbs and 25 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.
The power gap is worth calling out. Rated to 175 hp, the Arima SR Explorer 21 2010 has a 25-hp advantage over the Arima Sea Chaser 19 2012's 150-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads — 48 gal and 48 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Arima Sea Chaser 19 2012 is rated for 8 passengers, while the Arima SR Explorer 21 2010 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Arima Sea Chaser 19 2012 could be the deciding factor.
Bottom line: Choose the Arima Sea Chaser 19 2012 if your priority is putting more people on the water — it handles 8 passengers and at 18,9 ft it has the deck room to back that rating up comfortably. The Arima SR Explorer 21 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.