Both the Avalon 22 ft. CC - Rear Fish 2011 and the Avalon CC Fish - 20 Foot 2008 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 22 ft. CC - Rear Fish 2011 at 22,0 ft versus Avalon CC Fish - 20 Foot 2008 at 20,0 ft. Weight tells a clearer story for trailering families: the Avalon 22 ft. CC - Rear Fish 2011 tips the scales at 2 000 lbs - 420 lbs more than the Avalon CC Fish - 20 Foot 2008 at 1 580 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 - 100 hp for the Avalon 22 ft. CC - Rear Fish 2011 and 90 hp for the Avalon CC Fish - 20 Foot 2008. 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.
For family outings this is probably the sharpest distinction between the two. The Avalon 22 ft. CC - Rear Fish 2011 is rated for 10 passengers, while the Avalon CC Fish - 20 Foot 2008 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Avalon 22 ft. CC - Rear Fish 2011 could be the deciding factor.
Bottom line: Choose the Avalon 22 ft. CC - Rear Fish 2011 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 CC Fish - 20 Foot 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 9 that costs less to run day-to-day.