When two boats share the same hull type — in this case both the Avalon 21 ft. LS 2013 and the Avalon Catalina 24 ft. 2010 are pontoon designs with aluminum construction — 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 21 ft. LS 2013 at 21,0 ft versus Avalon Catalina 24 ft. 2010 at 24,0 ft. Weight tells a clearer story for trailering families: the Avalon 21 ft. LS 2013 tips the scales at 185 lbs — 163 lbs more than the Avalon Catalina 24 ft. 2010 at 22 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 — 115 hp for the Avalon 21 ft. LS 2013 and 130 hp for the Avalon Catalina 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 Catalina 24 ft. 2010 is rated for 11 passengers, while the Avalon 21 ft. LS 2013 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Avalon Catalina 24 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 Catalina 24 ft. 2010 if your priority is putting more people on the water — it handles 11 passengers and at 24,0 ft it has the deck room to back that rating up comfortably. The Avalon 21 ft. LS 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.