The Princecraft Sport 172 2011 vs Princecraft Starfish DLX SC 2005 comparison sits squarely in the category of decisions where specs alone won't tell the whole story: intended use, storage, and long-term ownership costs all factor in.
On paper these two are close siblings in the size department - Princecraft Sport 172 2011 at 17,4 ft versus Princecraft Starfish DLX SC 2005 at 16,0 ft. Weight tells a clearer story for trailering families: the Princecraft Sport 172 2011 tips the scales at 1 225 lbs - 715 lbs more than the Princecraft Starfish DLX SC 2005 at 510 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 Princecraft Sport 172 2011 has a 75-hp advantage over the Princecraft Starfish DLX SC 2005's 40-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 Starfish DLX SC 2005 is rated for 7 passengers, while the Princecraft Sport 172 2011 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Princecraft Starfish DLX SC 2005 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Princecraft Sport 172 2011 comes in at 11 lbs per hp versus 13 lbs per hp for the Princecraft Starfish DLX SC 2005. 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.
Bottom line: Choose the Princecraft Starfish DLX SC 2005 if your priority is putting more people on the water - it handles 7 passengers and at 16,0 ft it has the deck room to back that rating up comfortably. The Princecraft Sport 172 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.