Both the Avalon Tropic - 24 Foot 2008 and the Avalon Tropic 24 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 Tropic - 24 Foot 2008 at 24,0 ft versus Avalon Tropic 24 ft. 2010 at 24,0 ft. At 2 174 lbs and 2 200 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.
Both boats share a closely matched power ceiling - 115 hp for the Avalon Tropic - 24 Foot 2008 and 130 hp for the Avalon Tropic 24 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.
For family outings this is probably the sharpest distinction between the two. The Avalon Tropic - 24 Foot 2008 is rated for 14 passengers, while the Avalon Tropic 24 ft. 2010 caps at 11. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Avalon Tropic - 24 Foot 2008 could be the deciding factor.
Bottom line: Choose the Avalon Tropic - 24 Foot 2008 if your priority is putting more people on the water - it handles 14 passengers and at 24,0 ft it has the deck room to back that rating up comfortably. The Avalon Tropic 24 ft. 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 11 that costs less to run day-to-day.