When two boats share the same hull type — in this case both the Avalon 18 ft. Windjammer 2011 and the Avalon Bow Fish 20 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 18 ft. Windjammer 2011 measures 18,0 feet overall (2011), giving it roughly 16,0 additional feet of deck space compared to the Avalon Bow Fish 20 ft. 2009 at 2,0 feet (2009). At 165 lbs and 175 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 — 90 hp for the Avalon 18 ft. Windjammer 2011 and 90 hp for the Avalon Bow Fish 20 ft. 2009. 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. Both carry nearly identical fuel loads — 24 gal and 24 gal — so range won't be a tiebreaker here.

Both boats are rated for 9 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.

At this size, power-to-weight ratio matters more than outright horsepower. The Avalon 18 ft. Windjammer 2011 comes in at 2 lbs per hp versus 2 lbs per hp for the Avalon Bow Fish 20 ft. 2009. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.

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.