When two boats share the same hull type — in this case both the Avalon LS - Bow Fish 21 ft. 2010 and the Avalon Tropic 20 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?
Size is the most obvious dividing line here. The Avalon LS - Bow Fish 21 ft. 2010 measures 21,0 feet overall (2010), giving it roughly 19,0 additional feet of deck space compared to the Avalon Tropic 20 ft. 2010 at 2,0 feet (2010). Weight tells a clearer story for trailering families: the Avalon Tropic 20 ft. 2010 tips the scales at 175 lbs — 157 lbs less than the Avalon LS - Bow Fish 21 ft. 2010 at 18 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 LS - Bow Fish 21 ft. 2010 has a 25-hp advantage over the Avalon Tropic 20 ft. 2010's 90-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Avalon LS - Bow Fish 21 ft. 2010 is rated for 10 passengers, while the Avalon Tropic 20 ft. 2010 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Avalon LS - Bow Fish 21 ft. 2010 could be the deciding factor.
Bottom line: Choose the Avalon LS - Bow Fish 21 ft. 2010 if your priority is putting more people on the water — it handles 10 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Avalon Tropic 20 ft. 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 9 that costs less to run day-to-day.