When two boats share the same hull type — in this case both the Avalon Bow Fish 18 ft. 2009 and the Avalon Somerset 22 ft. 2009 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 Somerset 22 ft. 2009 measures 22,0 feet overall (2009), giving it roughly 4,0 additional feet of deck space compared to the Avalon Bow Fish 18 ft. 2009 at 18,0 feet (2009). Weight tells a clearer story for trailering families: the Avalon Somerset 22 ft. 2009 tips the scales at 205 lbs — 189 lbs less than the Avalon Bow Fish 18 ft. 2009 at 16 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 125 hp, the Avalon Somerset 22 ft. 2009 has a 50-hp advantage over the Avalon Bow Fish 18 ft. 2009's 75-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Avalon Somerset 22 ft. 2009 carries 36 gallons versus 24 gallons in the Avalon Bow Fish 18 ft. 2009. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Avalon Somerset 22 ft. 2009 is rated for 11 passengers, while the Avalon Bow Fish 18 ft. 2009 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Avalon Somerset 22 ft. 2009 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.