Both the Checkmate Convincor 300 2009 and the Checkmate ZT 275 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?
On paper these two are close siblings in the size department - Checkmate Convincor 300 2009 at 29,0 ft versus Checkmate ZT 275 2011 at 27,3 ft. Weight tells a clearer story for trailering families: the Checkmate Convincor 300 2009 tips the scales at 5 300 lbs - 1 200 lbs more than the Checkmate ZT 275 2011 at 4 100 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 525 hp, the Checkmate ZT 275 2011 has a 100-hp advantage over the Checkmate Convincor 300 2009's 425-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Checkmate Convincor 300 2009 carries 130 gallons versus 80 gallons in the Checkmate ZT 275 2011. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Bottom line: Performance buyers should lean toward the Checkmate ZT 275 2011 and its 525-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Checkmate Convincor 300 2009 with its 425-hp rating is the more economical daily driver.