Both the Skeeter FX 20 2011 and the Skeeter ZX 21 2013 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 FX 20 2011 at 20,2 ft versus Skeeter ZX 21 2013 at 21,0 ft. Weight tells a clearer story for trailering families: the Skeeter ZX 21 2013 tips the scales at 2 075 lbs - 255 lbs less than the Skeeter FX 20 2011 at 1 820 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 ZX 21 2013 has a 50-hp advantage over the Skeeter FX 20 2011's 250-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 50 gal and 50 gal - so range won't be a tiebreaker here.
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 ZX 21 2013 and its 300-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Skeeter FX 20 2011 with its 250-hp rating is the more economical daily driver.