When two boats share the same hull type — in this case both the Achilles SGX-122 2009 and the Achilles SU-14 2013 are inflatable non rigid designs with inflatable construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?
On paper these two are close siblings in the size department — Achilles SGX-122 2009 at 12,2 ft versus Achilles SU-14 2013 at 14,0 ft. Weight tells a clearer story for trailering families: the Achilles SGX-122 2009 tips the scales at 188 lbs — 160 lbs more than the Achilles SU-14 2013 at 28 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 — 35 hp for the Achilles SGX-122 2009 and 55 hp for the Achilles SU-14 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 SU-14 2013 is rated for 6 passengers, while the Achilles SGX-122 2009 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Achilles SU-14 2013 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Achilles SU-14 2013 comes in at 1 lbs per hp versus 5 lbs per hp for the Achilles SGX-122 2009. 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 SU-14 2013 is an inflatable design — lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Achilles SGX-122 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 SU-14 2013 if your priority is putting more people on the water — it handles 6 passengers and at 14,0 ft it has the deck room to back that rating up comfortably. The Achilles SGX-122 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.