Both the Avalon 19 ft. LS 2011 and the Avalon Windjammer 22 ft. 2010 are pontoon 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 - Avalon 19 ft. LS 2011 at 19,0 ft versus Avalon Windjammer 22 ft. 2010 at 22,0 ft. Weight tells a clearer story for trailering families: the Avalon Windjammer 22 ft. 2010 tips the scales at 2 000 lbs - 350 lbs less than the Avalon 19 ft. LS 2011 at 1 650 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.
Both boats share a closely matched power ceiling - 90 hp for the Avalon 19 ft. LS 2011 and 100 hp for the Avalon Windjammer 22 ft. 2010. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Both carry nearly identical fuel loads - 24 gal and 24 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Avalon Windjammer 22 ft. 2010 is rated for 10 passengers, while the Avalon 19 ft. LS 2011 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Avalon Windjammer 22 ft. 2010 could be the deciding factor.
Both are 2-tube and 2-tube pontoon designs respectively. Tube diameter and gauge affect stability and load capacity - more so than most buyers realize when comparing on paper.
Bottom line: Choose the Avalon Windjammer 22 ft. 2010 if your priority is putting more people on the water - it handles 10 passengers and at 22,0 ft it has the deck room to back that rating up comfortably. The Avalon 19 ft. LS 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 9 that costs less to run day-to-day.