Both the Rinker Captiva 216 BR 2012 and the Rinker Express Cruiser 340 EC 2012 are deep-V designs, both built in fibreglass, so 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?
Both boats share a closely matched power ceiling - 300 hp for the Rinker Captiva 216 BR 2012 and 320 hp for the Rinker Express Cruiser 340 EC 2012. 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 340 EC 2012 carries 168 gallons versus 42 gallons in the Rinker Captiva 216 BR 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 10 passengers - a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: The Rinker Express Cruiser 340 EC 2012 at 35,7 ft is the right call if deck space, comfort, and entertaining are top of your list. The Rinker Captiva 216 BR 2012 at 21,0 ft wins on trailering ease, likely lower purchase price, and simpler docking - a solid choice for a buyer who wants more boat for less money.