The Skeeter SL 1900 2011 is a modified-V design and the Skeeter WX 2100 2008 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 SL 1900 2011 at 19,0 ft versus Skeeter WX 2100 2008 at 21,0 ft. At 1 975 lbs and 1 950 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 WX 2100 2008 has a 100-hp advantage over the Skeeter SL 1900 2011'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 WX 2100 2008 carries 64 gallons versus 30 gallons in the Skeeter SL 1900 2011. 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 2100 2008 is rated for 7 passengers, while the Skeeter SL 1900 2011 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Skeeter WX 2100 2008 could be the deciding factor.
Bottom line: Choose the Skeeter WX 2100 2008 if your priority is putting more people on the water - it handles 7 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Skeeter SL 1900 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.