Matching a inflatable rigid Achilles HB-350DX 2009 against a inflatable non rigid Achilles SPD-335 2013 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-350DX 2009 at 11,5 ft versus Achilles SPD-335 2013 at 11,0 ft. Weight tells a clearer story for trailering families: the Achilles SPD-335 2013 tips the scales at 123 lbs — 121 lbs less than the Achilles HB-350DX 2009 at 2 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

Both boats share a closely matched power ceiling — 30 hp for the Achilles HB-350DX 2009 and 20 hp for the Achilles SPD-335 2013. 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-350DX 2009 is rated for 6 passengers, while the Achilles SPD-335 2013 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-350DX 2009 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Achilles HB-350DX 2009 comes in at 0 lbs per hp versus 6 lbs per hp for the Achilles SPD-335 2013. 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.

The Achilles SPD-335 2013 is an inflatable design — lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Achilles HB-350DX 2009 is a rigid hull, which typically offers a more confident ride in chop and easier maintenance over the long term.