Matching a inflatable non rigid Mercury V-570 2008 against a inflatable rigid Mercury V620 PVC 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 — Mercury V-570 2008 at 18,0 ft versus Mercury V620 PVC 2010 at 20,2 ft. Weight tells a clearer story for trailering families: the Mercury V620 PVC 2010 tips the scales at 1 071 lbs — 253 lbs less than the Mercury V-570 2008 at 818 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 — 135 hp for the Mercury V-570 2008 and 150 hp for the Mercury V620 PVC 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 Mercury V620 PVC 2010 is rated for 17 passengers, while the Mercury V-570 2008 caps at 15. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Mercury V620 PVC 2010 could be the deciding factor.
Bottom line: Choose the Mercury V620 PVC 2010 if your priority is putting more people on the water — it handles 17 passengers and at 20,2 ft it has the deck room to back that rating up comfortably. The Mercury V-570 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 15 that costs less to run day-to-day.