Matching a inflatable non rigid Zodiac 530 DL 2009 against a inflatable rigid Zodiac Cadet RIB 310 2010 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.
The power gap is worth calling out. Rated to 115 hp, the Zodiac 530 DL 2009 has a 100-hp advantage over the Zodiac Cadet RIB 310 2010's 15-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Zodiac 530 DL 2009 is rated for 9 passengers, while the Zodiac Cadet RIB 310 2010 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Zodiac 530 DL 2009 could be the deciding factor.
The Zodiac Cadet RIB 310 2010 has a documented top speed of 24 mph. Speed data wasn't available for the other model.
Bottom line: Choose the Zodiac 530 DL 2009 if your priority is putting more people on the water — it handles 9 passengers and at 17,4 ft it has the deck room to back that rating up comfortably. The Zodiac Cadet RIB 310 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.