When two boats share the same hull type — in this case both the Mercury PT650 2008 and the Mercury V620 PVC 2009 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?
Size is the most obvious dividing line here. The Mercury PT650 2008 measures 21,0 feet overall (2008), giving it roughly 19,0 additional feet of deck space compared to the Mercury V620 PVC 2009 at 2,0 feet (2009). Weight tells a clearer story for trailering families: the Mercury PT650 2008 tips the scales at 1 345 lbs — 274 lbs more than the Mercury V620 PVC 2009 at 1 071 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 — 150 hp for the Mercury PT650 2008 and 150 hp for the Mercury V620 PVC 2009. 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 Mercury PT650 2008 is rated for 19 passengers, while the Mercury V620 PVC 2009 caps at 17. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Mercury PT650 2008 could be the deciding factor.
Bottom line: Choose the Mercury PT650 2008 if your priority is putting more people on the water — it handles 19 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Mercury V620 PVC 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 17 that costs less to run day-to-day.