Both the Checkmate Convincor 300 2013 and the Checkmate ZT 350 2011 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?
Size is the most obvious dividing line here. The Checkmate ZT 350 2011 measures 34,4 feet overall (2011), giving it roughly 4,8 additional feet of deck space compared to the Checkmate Convincor 300 2013 at 29,7 feet (2013). Weight tells a clearer story for trailering families: the Checkmate ZT 350 2011 tips the scales at 8 000 lbs - 2 700 lbs less than the Checkmate Convincor 300 2013 at 5 300 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.
Bottom line: The Checkmate ZT 350 2011 at 34,4 ft is the right call if deck space, comfort, and entertaining are top of your list. The Checkmate Convincor 300 2013 at 29,7 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.