The Skeeter FX 21 2013 is a modified-V design and the Skeeter WX 1850 2012 is a deep-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.
On paper these two are close siblings in the size department - Skeeter FX 21 2013 at 20,8 ft versus Skeeter WX 1850 2012 at 18,8 ft. Weight tells a clearer story for trailering families: the Skeeter FX 21 2013 tips the scales at 2 175 lbs - 375 lbs more than the Skeeter WX 1850 2012 at 1 800 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 2013 has a 150-hp advantage over the Skeeter WX 1850 2012'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 FX 21 2013 carries 50 gallons versus 40 gallons in the Skeeter WX 1850 2012. 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 WX 1850 2012 is rated for 6 passengers, while the Skeeter FX 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 WX 1850 2012 could be the deciding factor.
Bottom line: Choose the Skeeter WX 1850 2012 if your priority is putting more people on the water - it handles 6 passengers and at 18,8 ft it has the deck room to back that rating up comfortably. The Skeeter FX 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.