Matching a deep vee Zodiac Medline II 2012 against a inflatable rigid Zodiac Pro Open 650 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.
On paper these two are close siblings in the size department — Zodiac Medline II 2012 at 19,7 ft versus Zodiac Pro Open 650 2010 at 21,3 ft. At 1 521 lbs and 1 477 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.
The power gap is worth calling out. Rated to 175 hp, the Zodiac Pro Open 650 2010 has a 25-hp advantage over the Zodiac Medline II 2012's 150-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Zodiac Medline II 2012 carries 58 gallons versus 32 gallons in the Zodiac Pro Open 650 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
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 Pro Open 650 2010 comes in at 8 lbs per hp versus 10 lbs per hp for the Zodiac Medline II 2012. 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 48 mph for the Zodiac Pro Open 650 2010 and 46 mph for the Zodiac Medline II 2012.
The Zodiac Medline II 2012 is an inflatable design — lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Zodiac Pro Open 650 2010 is a rigid hull, which typically offers a more confident ride in chop and easier maintenance over the long term.
Bottom line: Performance buyers should lean toward the Zodiac Pro Open 650 2010 and its 175-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Zodiac Medline II 2012 with its 150-hp rating is the more economical daily driver.