When two boats share the same hull type — in this case both the Achilles FRB-104 2012 and the Achilles LSI-230 2008 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?
Size is the most obvious dividing line here. The Achilles FRB-104 2012 measures 10,3 feet overall (2012), giving it roughly 3,3 additional feet of deck space compared to the Achilles LSI-230 2008 at 7,0 feet (2008). At 108 lbs and 52 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 — 15 hp for the Achilles FRB-104 2012 and 4 hp for the Achilles LSI-230 2008. 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 FRB-104 2012 is rated for 4 passengers, while the Achilles LSI-230 2008 caps at 2. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Achilles FRB-104 2012 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Achilles FRB-104 2012 comes in at 7 lbs per hp versus 13 lbs per hp for the Achilles LSI-230 2008. 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 FRB-104 2012 is an inflatable design — lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Achilles LSI-230 2008 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 FRB-104 2012 if your priority is putting more people on the water — it handles 4 passengers and at 10,3 ft it has the deck room to back that rating up comfortably. The Achilles LSI-230 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 2 that costs less to run day-to-day.