When two boats share the same hull type — in this case both the Princecraft Sportfisher 20 LP4S 2007 and the Princecraft Vectra 18 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 Princecraft Vectra 18 2009 measures 18,0 feet overall (2009), giving it roughly 16,0 additional feet of deck space compared to the Princecraft Sportfisher 20 LP4S 2007 at 2,0 feet (2007). Weight tells a clearer story for trailering families: the Princecraft Vectra 18 2009 tips the scales at 135 lbs — 119 lbs less than the Princecraft Sportfisher 20 LP4S 2007 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 90 hp, the Princecraft Sportfisher 20 LP4S 2007 has a 40-hp advantage over the Princecraft Vectra 18 2009's 50-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 Princecraft Sportfisher 20 LP4S 2007 is rated for 9 passengers, while the Princecraft Vectra 18 2009 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Princecraft Sportfisher 20 LP4S 2007 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Princecraft Sportfisher 20 LP4S 2007 comes in at 0 lbs per hp versus 3 lbs per hp for the Princecraft Vectra 18 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 Princecraft Sportfisher 20 LP4S 2007 if your priority is putting more people on the water — it handles 9 passengers and at 2,0 ft it has the deck room to back that rating up comfortably. The Princecraft Vectra 18 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.