Both the Skeeter 20i 2008 and the Skeeter SL 1800 2011 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 20i 2008 at 20,0 ft versus Skeeter SL 1800 2011 at 18,0 ft. At 1 850 lbs and 1 850 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 250 hp, the Skeeter 20i 2008 has a 100-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 20i 2008 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: Performance buyers should lean toward the Skeeter 20i 2008 and its 250-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Skeeter SL 1800 2011 with its 150-hp rating is the more economical daily driver.