Both the Skeeter FX 21 2011 and the Skeeter SX 180 2009 are modified-V designs, both built in composite, 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 Skeeter FX 21 2011 measures 20,8 feet overall (2011), giving it roughly 3,8 additional feet of deck space compared to the Skeeter SX 180 2009 at 17,0 feet (2009). Weight tells a clearer story for trailering families: the Skeeter FX 21 2011 tips the scales at 1 860 lbs - 590 lbs more than the Skeeter SX 180 2009 at 1 270 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 300 hp, the Skeeter FX 21 2011 has a 170-hp advantage over the Skeeter SX 180 2009's 130-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Skeeter FX 21 2011 carries 50 gallons versus 24 gallons in the Skeeter SX 180 2009. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 5 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 Skeeter FX 21 2011 at 20,8 ft is the right call if deck space, comfort, and entertaining are top of your list. The Skeeter SX 180 2009 at 17,0 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.