When two boats share the same hull type — in this case both the Zodiac Cadet 310 S 2008 and the Zodiac Classic Mark I ALU 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?

Size is the most obvious dividing line here. The Zodiac Classic Mark I ALU 2013 measures 11,5 feet overall (2013), giving it roughly 10,5 additional feet of deck space compared to the Zodiac Cadet 310 S 2008 at 1,0 feet (2008). At 93 lbs and 141 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 Zodiac Cadet 310 S 2008 and 25 hp for the Zodiac Classic Mark I ALU 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.

Both boats are rated for 5 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.

At this size, power-to-weight ratio matters more than outright horsepower. The Zodiac Classic Mark I ALU 2013 comes in at 6 lbs per hp versus 6 lbs per hp for the Zodiac Cadet 310 S 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.

Top speed is rated at 28 mph for the Zodiac Classic Mark I ALU 2013 and 22 mph for the Zodiac Cadet 310 S 2008.