Both the Skeeter SL 1800 2011 and the Skeeter ZX 250 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?
On paper these two are close siblings in the size department - Skeeter SL 1800 2011 at 18,0 ft versus Skeeter ZX 250 2009 at 21,0 ft. At 1 850 lbs and 1 790 lbs respectively, both sit in a similar weight class - either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
The power gap is worth calling out. Rated to 300 hp, the Skeeter ZX 250 2009 has a 150-hp advantage over the Skeeter SL 1800 2011'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 Skeeter ZX 250 2009 carries 50 gallons versus 30 gallons in the Skeeter SL 1800 2011. 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 ZX 250 2009 at 21,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Skeeter SL 1800 2011 at 18,0 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.