Both the Avalon 20 ft. CT - Rear Fish 2011 and the Avalon CC - Fish 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 20 ft. CT - Rear Fish 2011 at 20,0 ft versus Avalon CC - Fish 2010 at 18,0 ft. Weight tells a clearer story for trailering families: the Avalon 20 ft. CT - Rear Fish 2011 tips the scales at 1 800 lbs - 200 lbs more than the Avalon CC - Fish 2010 at 1 600 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 115 hp, the Avalon 20 ft. CT - Rear Fish 2011 has a 40-hp advantage over the Avalon CC - Fish 2010's 75-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. 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 20 ft. CT - Rear Fish 2011 is rated for 10 passengers, while the Avalon CC - Fish 2010 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Avalon 20 ft. CT - Rear Fish 2011 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 20 ft. CT - Rear Fish 2011 if your priority is putting more people on the water - it handles 10 passengers and at 20,0 ft it has the deck room to back that rating up comfortably. The Avalon CC - Fish 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 8 that costs less to run day-to-day.