The spec sheets list the Beavertail Final Attack 2013 as other and the Beavertail Stealth 1200 2012 as catamaran, so check how each hull rides in the conditions you use before you decide.
Size is the most obvious dividing line here. The Beavertail Stealth 1200 2012 measures 12,0 feet overall (2012), giving it roughly 4,0 additional feet of deck space compared to the Beavertail Final Attack 2013 at 8,0 feet (2013). At 75 lbs and 100 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 Beavertail Final Attack 2013 carries a rated maximum of 2 hp. Engine data for the Beavertail Stealth 1200 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 Beavertail Stealth 1200 2012 is rated for 3 passengers, while the Beavertail Final Attack 2013 caps at 2. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Beavertail Stealth 1200 2012 could be the deciding factor.
Bottom line: Choose the Beavertail Stealth 1200 2012 if your priority is putting more people on the water - it handles 3 passengers and at 12,0 ft it has the deck room to back that rating up comfortably. The Beavertail Final Attack 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 2 that costs less to run day-to-day.