The spec sheets list the Beavertail Stealth 1200 2013 as catamaran and the Beavertail Stealth 2000 2011 as other, so check how each hull rides in the conditions you use before you decide.
On paper these two are close siblings in the size department - Beavertail Stealth 1200 2013 at 12,0 ft versus Beavertail Stealth 2000 2011 at 12,0 ft. At 100 lbs and 120 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.
Both boats are rated for 3 passengers - a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: The Beavertail Stealth 1200 2013 and Beavertail Stealth 2000 2011 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.