When two boats share the same hull type — in this case both the Zodiac II 2009 and the Zodiac Pro 650 2010 are inflatable 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 — 150 hp for the Zodiac II 2009 and 150 hp for the Zodiac Pro 650 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.

For family outings this is probably the sharpest distinction between the two. The Zodiac II 2009 is rated for 11 passengers, while the Zodiac Pro 650 2010 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Zodiac II 2009 could be the deciding factor.