Both the Key West 198 SK 2013 and the Key West 2020 CC 2010 are modified-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 - Key West 198 SK 2013 at 19,0 ft versus Key West 2020 CC 2010 at 20,2 ft. Weight tells a clearer story for trailering families: the Key West 2020 CC 2010 tips the scales at 1 900 lbs - 550 lbs less than the Key West 198 SK 2013 at 1 350 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 200 hp, the Key West 2020 CC 2010 has a 60-hp advantage over the Key West 198 SK 2013's 140-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Key West 2020 CC 2010 carries 60 gallons versus 30 gallons in the Key West 198 SK 2013. 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 Key West 2020 CC 2010 and its 200-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Key West 198 SK 2013 with its 140-hp rating is the more economical daily driver.