When two boats share the same hull type — in this case both the Rinker Express Cruiser 310 2011 and the Rinker Express Cruiser 400 2011 are deep 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 Express Cruiser 400 2011 measures 41,5 feet overall (2011), giving it roughly 8,3 additional feet of deck space compared to the Rinker Express Cruiser 310 2011 at 33,3 feet (2011). Weight tells a clearer story for trailering families: the Rinker Express Cruiser 400 2011 tips the scales at 1 968 lbs — 1 847 lbs less than the Rinker Express Cruiser 310 2011 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.

Both boats share a closely matched power ceiling — 2 hp for the Rinker Express Cruiser 310 2011 and 2 hp for the Rinker Express Cruiser 400 2011. 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. Fuel capacity breaks the other way: the Rinker Express Cruiser 310 2011 carries 15 gallons versus 3 gallons in the Rinker Express Cruiser 400 2011. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Rinker Express Cruiser 400 2011 is rated for 12 passengers, while the Rinker Express Cruiser 310 2011 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Rinker Express Cruiser 400 2011 could be the deciding factor.