Matching a inflatable rigid Zodiac Cadet RIB 310 2011 against a inflatable non rigid Zodiac Classic Mark 2C HD 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 — Zodiac Cadet RIB 310 2011 at 10,2 ft versus Zodiac Classic Mark 2C HD 2012 at 12,5 ft. Weight tells a clearer story for trailering families: the Zodiac Cadet RIB 310 2011 tips the scales at 143 lbs — 126 lbs more than the Zodiac Classic Mark 2C HD 2012 at 17 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 — 15 hp for the Zodiac Cadet RIB 310 2011 and 35 hp for the Zodiac Classic Mark 2C HD 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 Zodiac Classic Mark 2C HD 2012 is rated for 6 passengers, while the Zodiac Cadet RIB 310 2011 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Zodiac Classic Mark 2C HD 2012 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Zodiac Classic Mark 2C HD 2012 comes in at 1 lbs per hp versus 10 lbs per hp for the Zodiac Cadet RIB 310 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.
Top speed is rated at 31 mph for the Zodiac Classic Mark 2C HD 2012 and 24 mph for the Zodiac Cadet RIB 310 2011.
The Zodiac Classic Mark 2C HD 2012 is an inflatable design — lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Zodiac Cadet RIB 310 2011 is a rigid hull, which typically offers a more confident ride in chop and easier maintenance over the long term.
Bottom line: Choose the Zodiac Classic Mark 2C HD 2012 if your priority is putting more people on the water — it handles 6 passengers and at 12,5 ft it has the deck room to back that rating up comfortably. The Zodiac Cadet RIB 310 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.