When two boats share the same hull type — in this case both the Avalon Bow Fish 18 ft. 2009 and the Avalon Paradise 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 Bow Fish 18 ft. 2009 measures 18,0 feet overall (2009), giving it roughly 16,0 additional feet of deck space compared to the Avalon Paradise 20 ft. 2010 at 2,0 feet (2010). At 16 lbs and 18 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.
The power gap is worth calling out. Rated to 115 hp, the Avalon Paradise 20 ft. 2010 has a 40-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 Paradise 20 ft. 2010 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 Paradise 20 ft. 2010 is rated for 10 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 Paradise 20 ft. 2010 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Avalon Paradise 20 ft. 2010 comes in at 0 lbs per hp versus 0 lbs per hp for the Avalon Bow Fish 18 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.
Bottom line: Choose the Avalon Paradise 20 ft. 2010 if your priority is putting more people on the water — it handles 10 passengers and at 2,0 ft it has the deck room to back that rating up comfortably. The Avalon Bow Fish 18 ft. 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 8 that costs less to run day-to-day.