When two boats share the same hull type — in this case both the Mercury 310 Dynamic RIB PVC 2011 and the Mercury PT750 2008 are inflatable rigid designs with plastic 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 PT750 2008 measures 24,0 feet overall (2008), giving it roughly 13,8 additional feet of deck space compared to the Mercury 310 Dynamic RIB PVC 2011 at 10,2 feet (2011). Weight tells a clearer story for trailering families: the Mercury PT750 2008 tips the scales at 2 127 lbs — 2 116 lbs less than the Mercury 310 Dynamic RIB PVC 2011 at 11 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.

The power gap is worth calling out. Rated to 300 hp, the Mercury PT750 2008 has a 290-hp advantage over the Mercury 310 Dynamic RIB PVC 2011's 10-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

For family outings this is probably the sharpest distinction between the two. The Mercury PT750 2008 is rated for 22 passengers, while the Mercury 310 Dynamic RIB PVC 2011 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Mercury PT750 2008 could be the deciding factor.