When two boats share the same hull type — in this case both the Zodiac Pro Open 550 2008 and the Zodiac Pro Open 550 2010 are inflatable rigid designs with rigid 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?

On paper these two are close siblings in the size department — Zodiac Pro Open 550 2008 at 18,0 ft versus Zodiac Pro Open 550 2010 at 18,1 ft. Weight tells a clearer story for trailering families: the Zodiac Pro Open 550 2010 tips the scales at 882 lbs — 785 lbs less than the Zodiac Pro Open 550 2008 at 97 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 — 120 hp for the Zodiac Pro Open 550 2008 and 120 hp for the Zodiac Pro Open 550 2010. 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 11 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.