Both the Xpress Sportsman Series - X21 Sport 2008 and the Xpress X19 2012 are modified-V designs, both built in aluminium, so the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?
On paper these two are close siblings in the size department - Xpress Sportsman Series - X21 Sport 2008 at 21,0 ft versus Xpress X19 2012 at 19,0 ft. Weight tells a clearer story for trailering families: the Xpress Sportsman Series - X21 Sport 2008 tips the scales at 1 583 lbs - 193 lbs more than the Xpress X19 2012 at 1 390 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 250 hp, the Xpress Sportsman Series - X21 Sport 2008 has a 100-hp advantage over the Xpress X19 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 Xpress Sportsman Series - X21 Sport 2008 carries 40 gallons versus 30 gallons in the Xpress X19 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 Xpress Sportsman Series - X21 Sport 2008 is rated for 6 passengers, while the Xpress X19 2012 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Xpress Sportsman Series - X21 Sport 2008 could be the deciding factor.
Bottom line: Choose the Xpress Sportsman Series - X21 Sport 2008 if your priority is putting more people on the water - it handles 6 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Xpress X19 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.