The Beneteau First 31.7 1997 vs Beneteau Swift Trawler 34 2010 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.
The power gap is worth calling out. Rated to 425 hp, the Beneteau Swift Trawler 34 2010 has a 404-hp advantage over the Beneteau First 31.7 1997's 21-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Beneteau Swift Trawler 34 2010 carries 211 gallons versus 8 gallons in the Beneteau First 31.7 1997. 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 Beneteau Swift Trawler 34 2010 is rated for 11 passengers, while the Beneteau First 31.7 1997 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Beneteau Swift Trawler 34 2010 could be the deciding factor.
The Beneteau First 31.7 1997 has a documented displacement of 8 267 lbs. Displacement data wasn't available for the other boat in this comparison.
Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Beneteau First 31.7 1997 draws 6,2 ft, compared to 3,0 ft for the Beneteau Swift Trawler 34 2010. That 3,2-foot difference affects which anchorages you can access, which haul-out facilities will take you, and how carefully you need to read the tide tables in shallower cruising grounds.
The Beneteau First 31.7 1997 uses Sloop rigging. The Beneteau First 31.7 1997 has a documented auxiliary engine of 21 hp.
For extended cruising, water capacity matters: the Beneteau Swift Trawler 34 2010 carries 85 gallons versus 42 gallons on the Beneteau First 31.7 1997 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.
Bottom line: The Beneteau Swift Trawler 34 2010 at 36,6 ft offers more living space, greater range, and a more substantial offshore capability. The Beneteau First 31.7 1997 at 31,6 ft is the easier, lower-cost option — simpler to crew and a strong choice for coastal and day sailing.