The Pro-Line 29 Express 2009 vs Pro-Line 31 Sport 2006 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 — Pro-Line 29 Express 2009 at 29,0 ft versus Pro-Line 31 Sport 2006 at 32,0 ft. At 75 lbs and 7 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 — 600 hp for the Pro-Line 29 Express 2009 and 600 hp for the Pro-Line 31 Sport 2006. 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 — 2 gal and 3 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Pro-Line 31 Sport 2006 is rated for 9 passengers, while the Pro-Line 29 Express 2009 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Pro-Line 31 Sport 2006 could be the deciding factor.
Bottom line: Choose the Pro-Line 31 Sport 2006 if your priority is putting more people on the water — it handles 9 passengers and at 32,0 ft it has the deck room to back that rating up comfortably. The Pro-Line 29 Express 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.