Both the Key West 186 CC 2007 and the Key West 2020 WA 2007 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 186 CC 2007 at 18,0 ft versus Key West 2020 WA 2007 at 20,0 ft. Weight tells a clearer story for trailering families: the Key West 2020 WA 2007 tips the scales at 2 000 lbs - 350 lbs less than the Key West 186 CC 2007 at 1 650 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 WA 2007 has a 50-hp advantage over the Key West 186 CC 2007's 150-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 WA 2007 carries 60 gallons versus 40 gallons in the Key West 186 CC 2007. 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 Key West 2020 WA 2007 is rated for 6 passengers, while the Key West 186 CC 2007 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Key West 2020 WA 2007 could be the deciding factor.
Bottom line: Choose the Key West 2020 WA 2007 if your priority is putting more people on the water - it handles 6 passengers and at 20,0 ft it has the deck room to back that rating up comfortably. The Key West 186 CC 2007 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.