The Achilles 126SB-3T 2009 is an inflatable design and the Achilles HB-350LX 2011 is a rigid inflatable design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
On paper these two are close siblings in the size department - Achilles 126SB-3T 2009 at 12,5 ft versus Achilles HB-350LX 2011 at 11,5 ft. At 135 lbs and 161 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 Achilles HB-350LX 2011 tops out at 20 hp. Engine specs for the Achilles 126SB-3T 2009 aren't listed - confirm with a dealer before selecting an outboard.
For family outings this is probably the sharpest distinction between the two. The Achilles 126SB-3T 2009 is rated for 7 passengers, while the Achilles HB-350LX 2011 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Achilles 126SB-3T 2009 could be the deciding factor.
The Achilles HB-350LX 2011 is an inflatable design - lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Achilles 126SB-3T 2009 is a rigid hull, which typically offers a more confident ride in chop and easier maintenance over the long term.
Bottom line: Choose the Achilles 126SB-3T 2009 if your priority is putting more people on the water - it handles 7 passengers and at 12,5 ft it has the deck room to back that rating up comfortably. The Achilles HB-350LX 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.