When two boats share the same hull type — in this case both the Zodiac 340 DL 2009 and the Zodiac Cadet Fastroller 310 FR Acti-V INT-L 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?
Both boats share a closely matched power ceiling — 30 hp for the Zodiac 340 DL 2009 and 10 hp for the Zodiac Cadet Fastroller 310 FR Acti-V INT-L 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.
Both boats are rated for 4 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.
The Zodiac Cadet Fastroller 310 FR Acti-V INT-L 2008 has a documented top speed of 23 mph. Speed data wasn't available for the other model.
Bottom line: The Zodiac 340 DL 2009 at 11,2 ft is the right call if deck space, comfort, and entertaining are top of your list. The Zodiac Cadet Fastroller 310 FR Acti-V INT-L 2008 at 1,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.