The Skeeter SX 240 2013 is a deep-V design and the Skeeter ZX 21 2013 is a modified-V design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
Size is the most obvious dividing line here. The Skeeter SX 240 2013 measures 24,1 feet overall (2013), giving it roughly 3,1 additional feet of deck space compared to the Skeeter ZX 21 2013 at 21,0 feet (2013). Weight tells a clearer story for trailering families: the Skeeter SX 240 2013 tips the scales at 2 925 lbs - 850 lbs more than the Skeeter ZX 21 2013 at 2 075 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.
Both boats share a closely matched power ceiling - 300 hp for the Skeeter SX 240 2013 and 300 hp for the Skeeter ZX 21 2013. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Fuel capacity breaks the other way: the Skeeter SX 240 2013 carries 75 gallons versus 50 gallons in the Skeeter ZX 21 2013. 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 Skeeter SX 240 2013 is rated for 8 passengers, while the Skeeter ZX 21 2013 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Skeeter SX 240 2013 could be the deciding factor.
Bottom line: Choose the Skeeter SX 240 2013 if your priority is putting more people on the water - it handles 8 passengers and at 24,1 ft it has the deck room to back that rating up comfortably. The Skeeter ZX 21 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.