Matching a inflatable rigid Achilles HB-350LX 2011 against a inflatable non rigid Achilles SPD-335 2012 means you're likely deciding between two genuinely 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 HB-350LX 2011 at 11,5 ft versus Achilles SPD-335 2012 at 11,0 ft. At 161 lbs and 123 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 share a closely matched power ceiling — 20 hp for the Achilles HB-350LX 2011 and 20 hp for the Achilles SPD-335 2012. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup.

For family outings this is probably the sharpest distinction between the two. The Achilles HB-350LX 2011 is rated for 6 passengers, while the Achilles SPD-335 2012 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Achilles HB-350LX 2011 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Achilles SPD-335 2012 comes in at 6 lbs per hp versus 8 lbs per hp for the Achilles HB-350LX 2011. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.

Both are inflatable designs, which means they pack down for compact storage, can be carried in a bag, and are dramatically lighter than equivalent rigid hulls. The trade-off is setup time and the need to monitor tube pressure regularly. Tube diameter differs: 18 in on the Achilles HB-350LX 2011 vs 18 in. (45 cm) on the Achilles SPD-335 2012 — larger tubes generally mean more buoyancy and a drier, more stable ride.