The Skeeter WX 1850 2010 is a deep-V design and the Skeeter ZX 21 2012 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.
On paper these two are close siblings in the size department - Skeeter WX 1850 2010 at 18,8 ft versus Skeeter ZX 21 2012 at 21,0 ft. At 1 800 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 21 2012 has a 100-hp advantage over the Skeeter WX 1850 2010's 200-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 21 2012 carries 50 gallons versus 40 gallons in the Skeeter WX 1850 2010. 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 2010 is rated for 6 passengers, while the Skeeter ZX 21 2012 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 2010 could be the deciding factor.
Bottom line: Choose the Skeeter WX 1850 2010 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 ZX 21 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.