When two boats share the same hull type — in this case both the Rinker 310 EC 2010 and the Rinker 400 Express Cruiser 2009 are modified vee designs with fiberglass 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 Rinker 400 Express Cruiser 2009 measures 41,0 feet overall (2009), giving it roughly 7,8 additional feet of deck space compared to the Rinker 310 EC 2010 at 33,3 feet (2010). Weight tells a clearer story for trailering families: the Rinker 400 Express Cruiser 2009 tips the scales at 1 968 lbs — 1 847 lbs less than the Rinker 310 EC 2010 at 121 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.

For family outings this is probably the sharpest distinction between the two. The Rinker 400 Express Cruiser 2009 is rated for 12 passengers, while the Rinker 310 EC 2010 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Rinker 400 Express Cruiser 2009 could be the deciding factor.