The Skeeter FX 21 2013 is a modified-V design and the Skeeter ZX 22 Bay T 2009 is a tunnel hull 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 ZX 22 Bay T 2009 at 21,0 ft. Weight tells a clearer story for trailering families: the Skeeter FX 21 2013 tips the scales at 2 175 lbs - 325 lbs more than the Skeeter ZX 22 Bay T 2009 at 1 850 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 50-hp advantage over the Skeeter ZX 22 Bay T 2009's 250-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 22 Bay T 2009 carries 60 gallons versus 50 gallons in the Skeeter FX 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 ZX 22 Bay T 2009 is rated for 8 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 ZX 22 Bay T 2009 could be the deciding factor.
Bottom line: Choose the Skeeter ZX 22 Bay T 2009 if your priority is putting more people on the water - it handles 8 passengers and at 21,0 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.